No one has to sell their property unless they fall outside what is allowed; which I can't remember off the top of my head. Sometimes people sell property in order to keep to a specific standard of care, having enough enables in some cases a better room etc.. And don't get me started either

If someone needs to go into care, the property cannot be sold if there are others reliant on living there, either a husband/partner or children who have not moved out.
My Mum is self funding. But it means that she is subsidising those on social care, which is why I believe that the two levels should never be mixed in the same property. The fees are taken by Direct Debit and we have never had an Invoice. Currently she pays £800.00 per week for full board, laundry, heating, electricity and phone in her room. Bed is changed on a Sat.. She has a small room with French doors on the ground floor, with a toilet next door. No ensuite available even though she is self funding. Her own TV and clothing in the wardrobe.
The local GP surgery over sees the home, it is a legal requirement that each has a Practice close by.
Some homes have physiotherapist, nursing staff, hairdresser, a library, movie room ........ mayB have a look at Churchill websites to see what is avialalbe. Mum has to pay extra for chiropody and the hair dresser.
I would expect ensuite/own room if she were paying in a BUPA or Churchill Nursing home.
My biggest suggestion is that who ever is looking at 'care', ops for full nursing care and not a 'care home' - where Mum is there are no nurses, even if there were because the Home is classed as 'care' rather than 'full nursing', it wouldn't help residents when they fall etc.. An ambulance would still be required to attend. Even if nursing care isn't currently required, we will all need more and more help as we age. A nursing home choice means that residents don't need to move from a care situation.
It will depend on how much it costs as to who is running the Company. As well as which area the building is in. Making sure that there is no smell of urine - I don't know how to find out if the home is well staffed. CQC Reports I have found aren't worth the paper they are written on! Lip service for the government.