I live in a 3 bed HA house, it’s just me and my 2 dc, age 15 and 9.
I say 3 bed, but one of the bedrooms is tiny, and dd2 has that one. She’s got a shorter than normal single bed, as there’s no way I’d have been able to put any furniture in there if it was a regular single. I spent around £1k less than a year ago making her room lovely, with lots of clever ikea storage.
Dd1 has a small double room and my bedroom is a large double.
Problem is, dd2 is growing like a weed and I reckon in maybe a year she’ll have outgrown her bed, and then I’d have to take all her furniture and storage away so she could have a normal single bed. And then I’d have the issue of where to put all her clothes and belongings, there really isn’t anywhere else for it all to go.
So I was considering when the time comes giving her my room. Meaning I don’t have a bedroom anymore. I’d have to sleep downstairs in the living room, either getting a sofa bed or by turning it into a proper bedroom and then having no living room. I have a bf who stays a couple of nights a week so would need a double bed (no plans to ever live together 
).
There are only 2 rooms downstairs, and you have to go through the living room to get to the kitchen. And only one bathroom in the house, which is upstairs.
It’s very unlikely dd1 will move out for a long time yet, she’s autistic and I anticipate she’ll be well into her twenties before she goes (if she ever goes!). And her autism means that the girls can’t share a room, so putting them in together is a no no.
Am I mad to consider this? Really don’t want to give up my house as private renting is so expensive around here.