You esentially get what you have paid for. A small-size camper with no water supply - had to get it myself with a bottle from a tap in the garden, something not pleasant to do given the cold rainy days when I was there. The host provided only one extension cord for electricity with a single entry/socket, I only realised the second day that there was another extension in one of the shelfs, cause I wasn't told. The only lamp available inside the camper was also broken, and I could get another one only after the second day.
I thankfully got the right to shower myself inside the house, something that wasn't given for granted despite the poor water supply conditions. But showering was ceetainly not available when the owners were out.
There was no internet - the host showed me a wifi network that never became reachable from the camper, I ended up using my own roaming when had to communicate.
The toilet was a tiny camper space in which I could barely fit in - and I am not particularly tall, 1.75 mts. Had to clean to wc bowl with my own water as there was no tap.
The host was friendly, but it lacked the attention of details that could otherwise had made my experience somehow better. The weather was also a negative factor, maybe during sunny days the place would have been better, as you can use part of the garden.
It was still one of the cheapest places I found available. But you can certainly have access to standard electricity, a bathroom and internet by paying a bit more.