I didn't want to become a landlord. I bought a little one bedroomed house just before crash so was in negative equity. When family grew couldn't afford to sell and make up the short fall so rented out our house and rented somewhere bigger.
Currently have tenants in. There's always something that needs fixing, the mortgage interest rate has gone up, the tax bill has gone up, more regulations likely in the next couple of years. We want to get another mortgage but that mortgage will impact on what we can borrow. But I also feel bad giving someone the stress of finding somewhere else to live.
YABU - wait until they move out then put it up for sale
YANBU - do what's best for my family and tenants understand that's a risk of renting