I found out (which I did not realize before) that Park National has a grant loan product that has no income limit, and works on up to 4 units. 

Owner says they haven’t had any failures. 1) Is there a warranty or insurance product out there I could get seller to purchase to cover the systems in case they start failing.

I have purchased a property via upset sale.

Your CPA can't tell you if you will get part of the 10% withholding from the sale?

Lastly, I am a direct lender on the products I mentioned above and would be more than happy to discuss further over DM if you're interested!

There are many other loan products available in addition to Creative Financing methods that will allow you to keep much of that money in your pocket to get involved in more future deals sooner.It really just depends what strategy you're looking to implement, BRRRR, Fix/Flip, Short Term Rentals, etc...Have you considered adding value to the properties you're Acquiring?

Insurance: Is there a standard percentage of the sales price that's considered competitive?

Sale price: $336,000 I bought a 135 year old home in down-town Conway, SC with the intention to live in it while we fixed it up, and rent it out as a STR once it was ready.

It looks like you're on target with the bullet points you provided here.I do this type of deal all the time, feel free to connect with me to discuss more (preferably tag me back in a reply here so I can provide value to everyone with public replies).You can catch up the arrears, make monthly payments, and either LTR, STR, or wrap-sale it to yet another end buyer for a markup!

Sale price: $336,000 A "You live and you learn" experience!