The question that it would bring up to me is the seller aware of disclosure laws in the state because I suspect in most states a seller is required to disclose known defects they can't simple state "as-is" like when selling a car and not tell the buyer material defects with the property. 

I suspect it ended up costing the (LL) a lot of money.  

I suspect that your math is conservative and you are still above break even.

Unsafe being known mold not removed and treated by remediation company trained to address mold, known or suspected exposed friable asbestos material not properly sealed according to industry standards.If you are just trying to CYA, then you will scare of prospects and create undue stress in your life.

I suspect NOT if it has been on market for 7+ months with only 2 interested buyers.

Suspect it is the tech challenged that have an issue.

In NC (and I suspect other states as well) they are very easy to set up, especially after watching a couple YouTube vids. 

Here's a qucik mockup of the garage more matching the house.That foundation, wow, what a mess.If it were mine I would have a structural engineer and maybe a soil engineer come out and give an opinion on it.It's sheer weight may have made it crack off like that, no rebar, etc...If it's was salvageable, maybe I would jackhammer away the broken parts and reset the walls on the good part. making the garage smaller.Disassembling and bracing one wall at a time and increasing the overhang of the roof.Then when done, gypsum board the entire thing inside and paint it ceiling white.If it were  my personal garage I would Pink Panther insulate it and use a space heater for winter comfort.It could be a nice little gym for renter who works out.Also, I would have an electrician verify the electrical is hooked up correctly for garage (because the concrete seems amateurish I suspect the electrical may be too).

I'm "Old School" and I suspect you are in the Mellineal generation.

I suspect with a little effort you would have 4 to 6 relationships with syndicators out of one decent bootcamp class.