First option to do this is reframing and shingle etc.

If you short him 3 squares of shingles, 5 pieces of drip edge and some L metal, he won't work for you for long...

And a loan on them too.And a lawsuit on them too--undisclosed.And they are probably permanently turned off.You really drew the low card from the deck on this one (at least it's only $33,000)Also, be ready for when it's re-roof time and they have to be removed $$ to re-shingle the house.I always consider solar panels a negative.The way I see it (back of a napkin calculations):Panel life est 25 to 30 years--then must be paid for to be removed, hauled to dump, and replaced.Boston Solar savings average = $30,000Loan on Panels = $33,000 could be structured to be $99,000 in total cash payments if 30 year loan.add to that the extra cost of removing and re-installing them to re-shingle.That's why I'm not pro solar on houses.Do the tax benefits (if any) make that a wash or profit, I suppose that is for the salesman to point out.Still, it's not something I consider a positive in a deal.And Austin is subtropical sunny.Link to Calculator:https://www.google.com/search?

Talk to your neighbors see who they used.OLD HAIL: The granules were knocked off the shingles exposing the underlying felt.

They were both in good locations, but needed everything from the cedar shake shingles, paint, landscaping and reconfiguring the large medical style office down to size and style of general office layout.  

The owner must grant such access to computerized or other electronic records & to any computers, facilities & must provide any information or assistance needed to access the records.5.

When I discuss them I focus on the point you made on performing due diligence most because some flat roofs can last longer than some shingle roofs and they can potentially offer an advantage to get a property that less savvy investors may not look at.

Biggest lessons learned is that Georgia allows reroofing over old shingles.

When I'm driving; for some reason my eyes can always pick up on high grass, abandoned car in driveway or roof shingles missing that gives me a signal that the house owner is either out of town or has given up on the property.At that time, my biggest problem was the follow-up.

She put a new shingle roof, new power pole, all new siding and skirting (looks like a new MH), new windows, and stripped all the interior walls to the studs.