If title is clean, a cash deal can close in 7-14 days.

It took about 15k to clean, paint and band-aid the property to the point where we could fire sale it.

Clean, repair, and/or replace as needed.● Extend all other downspouts at least 6 ft from the house.

and there's cleaning, carpet, painting, patching.

Getting title and getting clean title for properties bought at tax auctions are two different things. 

Also received the Scope of Work: roof repair, exterior paint, replace rear siding, new exterior doors, new gutter, soffit and fascia repair, clean and seal basement, electrical repairs and new breaker 100 amp breaker, refinish hardwood floors, new vinyl kitchen floor, new furnace and duct work - Estimated $9,100 total."

If your budget is so tight that you can't handle a small leak, what will happen when a tenant fails to pay the last month of rent and abandons the property with $6,000 in cleaning and repairs?

Tell them to get out in seven days, use the deposit for unpaid rent, cleaning, and repairs.

You hired cleaners to clean the unit between tenants?

If you choose not to show up, he would almost certainly be awarded a judgement.Of course, you could choose not to pay the judgement, but then he can send it to a collections agency and your credit score will be trashed.I don't see a scenario here where you get through this cleanly.