Write a first chapter of slice of life light novel with following premise:
* the protagonists is a young college-aged woman and her roommate;
* they somehow acquired the access to livable slightly unkempt, small(several buildings and a plot around them) pocked dimension located... who know where. With garment workshop inside;
* one building - business. Workroom, reception, storage (with tools, spare parts and materials, non-perishable consumables, etc), miscellaneous specialized rooms, etc;
* the workshop, seems, uses not only fabric but also some quite exotic an unknown one;
* other building - owner's quarters. Very nice rooms and accommodations;
* cellar - well, as expected from private old home;
* the plot reasonably big - in addition of already menioned it big enough to have small grove, stream, garden, [come with some building making no sense on residential/workshop lot], storage shed, recreational area, pool, etc;
* everything looks cozy, non-scary, non-threatening, abandoned but mothballed for the next owner;
* at some moment some official from some variant of celestial bureaucracy [come with some original pantheon name] visit them and explain and confirm that yes, they are really owners(finder's rights apparently is a thing at whatever law codex they follow) of this slightly outdated workshop and vaguely(claiming business) promised to send someone to explain them what it all about. Cue even more confused and weirded(who just give away a *workshop*?) college girls and small stack of not-quite-paper documents with abosolytely clear (wonder of wonders) legalise.
* they can go in it and go out to real world at any time - the way of access do not trap anybody;
* the entrance point is a door they found inside scrapped motorhome they bought at car cemetery to live in after eviction;
* the motorhome is in working order. Somehow and barely but they can move it to more convenient  place if so desired;
* time flow at the same rate inside factory and in the main world;
* aside from being located in impossible space and somehow working electricity and other utilities(even WiFI. no cell coverage and GPS is wonky though), there is nothing supernatural there (at least nothing of threatening kind);
* now, having proof they are not squatting,  they are moving in and settle in it(no way they ignore such nice owner's quarters);
* they slowly fixing (lazying around is important when you have the place to do it) various disrepair because they want to understand what exactly workshop is for and also it is stupid not to use so much of real estate if you own it.

Various trivia for worldbuilding:
* please no fluorescent lights. Too cliché;
* the location of workshop is conceptual space but protagonists do not knew that initially and deduce that latter in the novel;
* the purpose of workshop is to make the costumes for magical girls from various media and genres. They knew that they are fictional. But even the fictional characters can't get their outfitsh just from thin air. The protagonists initially do not knew that and certainly do not expect it at all;
* they are paid in conceptual currency - basically, idea of money;
* protagonists actually move access point to more convenient place (security - they do not want anyone get suspicious and sic some government agency on them). That old refurbished garage seems perfect;
* as they upgrade and tend to workshop  , the motorhome changes too, become less a junk and more presentable;
* one girl is fashion designer other is clothing industry major;
* the pocket dimension is obviously pocket; there are visible borders, environment and live support systems of unknown constructions, supporting structures...things, etc;
* they actually called somewhere about improbably door. The response? Totally non-surprised "Meh. Happens all the time. Yes, really. This town is... weird. We have alien princess transferring in last semester. And gungeon master running dungeon on outskirts."
* after transfer of ownership celestial bureaucracy was newer seen or heard again.  Bureaucracy 'efficiency' duh;
* the workshop have front door where customer enter, they are not just telport themselves;
* the enrance door do  not lead into corridor or hallway. It leads to porch;
* the dimension is not a character. It a place of the story. It do not talk to protagonists in written form nor any other ways.

Incorporate some of tropes and mechanics from 'base building', 'base management', 'business management', 'resource management', 'farm simulator' games. Show how protagonists slowly come to terms about ontological impossibility of establishment they own and cater for. Focus on management side narrative and on how protagonists balance their narrative obligations with real-world life.

Use first person view of one of women. You may use any trope you think are necessary. Be vivid, verbose, detailed, descriptive and expressive. Rearrange, redact and edit text to follow proper storytelling conventions and for logical narrative progression. Do not drag chapters unnecessary, edit out repetetive parts.

Here us a starting snipped for inspiration(but do not use verbatim, redact, rewrite and edit it too):
"That... not how geometry works," my roommate stared through doorframe of the door she just lockpicked with liberal application of [choose humorously suitable instruments]
"It is if life was especially mind-screwing computer game. Random portals are thing there", I