Christian and Jang have a place right in the restaurant/bar zone downtown. Its about 12 min walk to the National Theater and the train station. Its a very central location.
They are helpful.
My room was the smallest - definitely for 1 person only. Functional, but no extra space. Bathroom is shared and kept clean. The laundry is in bathroom - so it can be quite warm in when going into the bathroom.
The hosts greeted me with coffee in the morning, sometimes toast and coffee. Jang brought me an ice cream one afternoon.
Be aware that Norway is not really expensive. Its beyond expensive.
"Cheap" beer in a bar is about $10 / draft or bottle.
Good IPA is easily $15 each.
A veggie burger, fries and beer is about $35 USD but could be more.
A taxi around the corner starts at about $18 USD.
A taxi to the airport was offered at 1000 NKK, over $100 USD.
(Take the train).
I nice dinner with wine is going to be $75 each or more.
On departure I found Oslo airport strikingly unorganized, unhelpful, lousy signs, not enough chairs. Really strange. Our gate was moved at last moment and everyone had to hussle to get to new gate.
The Viking, Fram, Kon-Tiki and Folks museum are awesome - the reason I went. They are the ONLY value I found!
The hosts - quite friendly about how to save $ and get around!
A black coffee is about $6+ USD.