Are you able to sell house? I bought my first home in Whiterun but there are some bigger homes in other holds but I don't want to have two houses'

Also if I have two homes can I have 2 wives lol

You can probably sell it in pc. But why would you. Keep your blacksmith stuff at whiterun, two forges in town and all.

I'd like to sell a home too, but it does not presently seem to be an option. I don't think it ever has been, so long as homes have been in TES, so I'm not too surprised that they didn't build it in.