This can never be said enough -

1 - We should be able to sell a house - you don't don't get to choose the amount. One option - Full non-depreciated value of the lot. Seller purchases a Letter of Tender (ie 100 gil from vendor - mails letter to purchaser (since you can only mail someone on your friend list) Purchaser accepts sale (ie 16 mil gil). House is his/hers - seller gets the gil.

2 - We should be able to re purpose our own house from a personal house to an FC house - non reversible. IE you cannot go from a FC house to a personal house.