I have been in a few 'unique' housing situations so feel im a tiny bit qualified to answer.
People, be it family, friends or bosses (or people you work with) have every good intention when they make offers like this.It may be to rent one of their houses, to have you share their home or even (and this has happened to me), buy you a house of your choosing and then rent it back to you for the going rate. BUT, it rarely ends well and i will tell you why.
They may be completely reasonable people who are making this grand gesture because they care about you/are your friend/want to help you out. It will appear that it is no strings and they will tell it is no strings and for all intents and purposes it will be no strings. You pay rent and get to live somewhere you like/have chosen etc
In my experience and from friends in similar situations, the difficulties arise when one day, (and it will come) they ask something of you, it maybe accommodation related or it may not be accommodation related, but you cant do it for whatever reason, all of a sudden and it happens completely subconsciously, (because remember, these are completely amicable, reasonable, normal people), they are thinking 'but, i bought you a house!' 
And BAM! Hello bad feeling/resentment/subconscious hating on you/etc. You get the drift.
The situation I ended up in was linked to my job and renting a property from them and having it thrown in my face when i decided to move on career wise. I couldnt then wait to get out of the rental contract we had got ourselves fixed into. My personal relationship with my boss then disintegrated and we couldnt even continue the friendship we had struck up.
I have since been offered other situations like this and have flat out refused. I valued my relationships with the people offering too much to risk it over them housing me and my having already been in this situation and not wishing a repeat it.
People offer these things with every good intention, but believe me, it has a very real risk of going very wrong, very quickly.
Tread carefully.