I'd call insurance before having any sort of plumber to come do any repairs.

Look into FHA 203(k) loans for repairs and down payment assistance programs in your area.

I've had a lot of large repairs in the past year that just kill the cash flow.

There's not many tools in the box to repair many years of poor policy i.e.

Quote from @Dan Grove: Some combination of cash to seller, closing costs, repairs, construction, paying off arrears, assignment fees, commissions.   

I guess it's just too many factors to consider and it easy to get overwhelmed and cannot get accurate info and estimation when I conduct analysis (ex. property tax rate, insurance, maintenance fee, rent, repair, closing cost, etc.) 

That aside, If it were me I'd get a professional estimate of what repairs would cost, and make the decision to keep or sell based on that. 

Quote from @Alecia Loveless: @Natalia Perlova Absolutly no to the Sunday repair.

And that’s with zero vacancy, zero repairs, zero capex.

Zoning says that it is a repair service shop, excluding automobiles, any idea if leasing out storage space would be permitted?