Looking for room 1-2 nights per week in Bristol

I am doing a PhD at Bristol Uni in psychology. I have a home and family in London and I’m there most of the time but need to be in Bristol sometimes. I’m looking for a room to rent for 1 or 2 nights per week. It would suit someone who would like to earn a bit of money from renting out a riom but doesn’t want to have someone there the whole time and wants a bit of flexibility (if you need the room because you have someone staying then I can stay somewhere else).. I’m quiet and easygoing and tidy, honest, reliable etc etc Please feel free to ask any questions.