You have to take the sellers numbers, use the ones that will be applicable to you (like utilities and taxes), and also use different numbers that are the ones that are specific to you (debt service on that bigger loan that you'll be needing).Lots of good advice from other posts above.

Financing will be 30% down ($10,500), 6% for 15 years with a payment of 206.74Expenses monthly are:-Taxes $115.66 currently-Insurance $52.25-Maintenance (10% of rent) $93-Utilities ($50 per quarter, per unit for water and sanitation) $33.33-Management (10% of rent) $93-Vacancy (10% of rent) $93Once I take my expenses and debt service from my gross rent, I'm left with $243.01 cash flow for a 27.77% COCR.

Eliminating the cause of the humidity will help prevent reoccurance of the problem.

I was wondering if anyone had heard the rule of not spending over half of ones' savings on anything if you have no debt.

As for the trenchless repairs, I once saw on a television show how they were repairing lines in NY using some type of material that is sprayed into the old pipes and basically forming a new one, eliminating the need to dig up the roads, etc.

Why not just eliminate the lender from the offer?

Dodd Frank and the CFPB regs have made seller financing to owner occupants way more challenging and risky, with some investors completely eliminating this strategy. 

The jack under the house does look shoddy, but I don't know that it's a reason to eliminate a purchase.

Yes, student debt is a debt that applies to your qualification ratios, best way to reduce that is.....STAY IN SCHOOL!

I am not a big fan of debt but it does help achieve larger goals.