I probably couldn't afford to trench down and install the drains myself given the amount of demo and refinishing that would be involved.

Also looking to see if drywall trim and floors are salvageable or is it going to be a full gut.If you can just clean up the walls and trim add a fresh coat of paint and refinish the floors or install carpet and laminate you will be in much better spot then if you had to start removing these items buying new and paying for it to be Installed

Tub refinishing kits are a great racket.

Epoxy will only last for so long.Check some factors- Whats the Grade of the lawn-  Does the basement need to be re-finished- Are downspouts positioned correctly 

We will also be taking out the lava rock bbq, refinishing decks, and adding a hot tub (which needs to be screened)  QUESTION:  That area next to the garage is where the garbage can is, and then there's a large storage area. 

Rehab" Costs: Siding 1.5K, Carpet 1K, Refinish floors 1K= $3,500Potential Rent: $900-1050Wholesale Fee: 6-8KSeller Contract: 82KAssignable Contract: 88-90kQuestions:Is this worth pursuing?

I have found there is a big cost difference to refinishing a unit (even kitchens and baths) and having the towns come in and decide you have to upgrade everything to code.

Shower and bathroom sink defective and in bad shape.All carpeting replacement (or refinish hardwood underneath. 

I refinished the oak floors that were under the carpet.

Some of our major expenditures off the top of my head:Plumbing: 24kHVAC: 12kRoof: 6k (flat roof TPO)Floors: 9k (refinished most, replaced the master bedroom)Electrical: 12kDemo: 6.5kConcrete/Fence/Landscaping: 14.5kWindows: 7kTuckpointing: ~6k (if you don't know what that is, it's brick work basically)Architect: 2.5kCabinets and countertops (kitchen): 9kFraming: 9kDrywall: 13kPaint: 4k (paid someone to help so it wasn't just me)Doors: 5k (lots of doors including 4 exterior)Appliances: 2.5kStaging: 2kThe other 20k or so went to Vanities, trim (we used good 7" trim board that matched the original trim), waterproofing, permits, finishes etc...