On one of the deals, the Seller is so motivated he is willing to offer a substantial carry back at the closing table in order to help me cover costs of financing and help buy down whomever I bring in to the deal.

I currently own and live in a 2 bedroom condo where I rent out the spare bedroom through AirBnb which covers the mortgage and HOA.

It is partially rehabbed but 2 of the rooms are severely covered in mold (bedroom and basement). 

These income producing properties are a good source of income for our business especially in the tough times to cover overhead when we aren't building homes.

What we receive from the properties (which include mobiles in Merced County) has not been able to cover an ongoing, unforeseen family situation we'd never anticipated. 

We calculated PITI before at $3,105, which leaves you $95/month to cover management (if you don't self-manage), repairs, maintenance, vacancies, turnover costs, etc. 

Similarly the prior owner, again unless he did something intentional to cover up the defect, you bought the house 'as is' as of the day of closing.

It will cost $1,600 to get treated and I'd like for the sellers to cover this if possible.I'm considering installing solar panels, but not sure if it would work well with this property due to a large number of trees.  

Does it cover replacement of the structure or simply what's owed (assuming there is a mortgage in which case the lender is paid and you are left with a smoldering pile of rubble)?

Keep in mind title insurance companies differ in what they can and will cover. if one doesn't cover it, perhaps another will.