Although in the last couple deals most have come out as 506C deals where only accredited investors are allowed, there are still 506B syndications where you can be a sophisticated investor (self proclaimed) so you don't have to be accredited.

If the permanent financing will allow you to recover most of your initial investment and the fair market rent covers the principal, interest taxes, and insurance with cash left over, you have a BRRRR.

However, the 0% interest only lasts for about 12-15 months but definitely more than enough time to complete the brrrr cycle twice or maybe three times in your case since you're a contractor as well!

I called my local insurance company, as well as two major companies and was told "good luck." 

So I would like to get these things hashed out well beforehand as something to present to potential clients and have procedures for my company.

I’ve done some research and have found that some banks will allow the seller finance portion from the seller to go towards the down payment of the loan, is that true?

However short contract period allows you to pursue other avenues to sell if the wholesaler can't execute on the terms they offered.

Nathan Roberts also on this site may have some suggestions as well. 

What's the lowest credit score you will allow?

The provider I am using allows for 60 days of continued coverage once construction is completed.