You need to develop a Scope Of Work that is precise and then start getting prices for all the work.Once you have that magic number, then you will add that to the cost you pay for the house, along with any other fees or expenses...Then look at finished Comps (get a Realtor like @Chris Ayars said) and see if you will make any money......

The magic eraser works fairly well for cleaning off the stains, but it is more work.  

Umbrella insurance isn't a magical cure all2.

There are no “magic” words that make people give you property.

The State & Fed HTC's can help close the gap. 

It was like magic, the smell was 100% gone.

For stubborn marks, use Magic Eraser.If there are other broken parts, those are readily available too.

Of course they charge for their services and expertise so that should be factored in to your decision.I wish there was a magic solution but I think you’re on the right track, best of luck!

People get crazy about cash flow in house-hacking, as if there's some magical line of good and evil between being $5 in the hole or $5 in the black.

Magic!