They dont want to be on the phone dealing with tenant issues and leaky pipes.

Well- this tank has 4 total chambers- the last is a narrow well that takes the 'clean' water through a pipe where chlorine is added.

Not trying to sell anyone a pipe dream.

They know the clock is ticking before the leaks really start up again, and right now the fiberglass is just absorbing moisture.Other high-probability items to take note of: plaster-on-lath construction, knob-and-tube electricity, water supply piping is galvanized steel, gutters are integrated box gutters, DWW is cast iron, the boiler is from the 1950s with huge pipes and a big circulatory pump, the windows are old wood. 

Basically these would chill down the water that runs through the radiators / pipes in the house and this could cool the house down in the summer.

How can he say it's scaled if he can't get around the toilet pipe bend? 

Once he tried to hang a picture on the wall, drove a nail through the wall, and thinks he hit a pipe.

Always exhaust your conventional financing first.

Moderator), go for bank financing first (even though it provides the most hassle) and then go for more of a portfolio lender once you've either exhausted that avenue or you don't qualify.There is a lot of good information about structure and how it affects purchases and lending here on Biggerpockets with a wealth of relatively free information. 

20% down is a pipe dream.In low interest rate environments before with cap rate at 5.0 and debt at 3.5% with DSCR ratios still looking at 30 to 35% down.Now because cap rate maybe in 6's and debt in 5's for credit grade BBB- or better tenant making down payment about 40% or more down.20% down not happening on these.I don't want to comment further because you are looking for a miracle.