Can anyone recommend a company that offers a builders risk policy to cover the construction period but then will also allow a cancellation and refund after work is finished to convert into a standard landlord policy.  

But, nice to hear from you.

Use your savings and equity to get the next one and keep this one. 100% agreed here. 

One thing to explore is Equitable Ownership.

Hey Joel, WELCOME to BP!!

Baselane does have customer support and @Saad D., one of the creators, is active here and can probably assist you as well.

Right now treating it as interest but would like to make it active income to do a solo 401k .

Even then, you can expect they won't be able to maintain the home to the same level you did while living in it.

Quote from @Sean O'Keefe: Click the arrow in front of “Quote” and you’ll see the comment / post that was responded to.  

He just wants to sell the house and use to $ to help his father with health issues, so he's willing to sell for under market value.