I can not answear with certainty the other points so I will not try BUT

Personal capital gains sounds better I think if you want to sell the company that is.

That is if the counterparty wants to buy your company of course and not just the house (because of liability issues), I guess though in the sale & parchase agreement you can have a provision that you protect them from any liability that will arise if you are sure you managed your company well.

I hope I helped a tiny bit