Mentally and physically I am drained from all this.

Plumber found that it looks like our toilets' closet flanges failed and there was a clog in the drain line that the toilets share (the units back to each other and share a drain line in the wall).

I take them out and install a grid drain.

The economy goes down the drain and your vacancy rates rise.

Overflow drains are 2 inches higher that the main roof drain.  

I'd have the engineer draw something up depending on the severity, I did one a few years back for a client the foundation was in bed rock and alot of water pressure against it,we back filled 3/4 of the wall with gravel to drain it and relieve the pressure then installed I beams along the interior back wall to reinforce it.

If you don’t have proper conversion tracking installed, you’re literally pouring your hard earned money down the drain, due to the fact you’re basically shooting in the dark.

All of my other properties are cash flow properties, this one would be for appreciation.I have a hard time seeing a potential gain of $40-50K go down the drain, yet this is quite aggressive.Are there any other questions I should address or should I continue on this path?

If you are concerned about space for draining dishes you could buy a dish drainer that fits over part the sink (with expanding ears)The other thing that I notice is the door opening into the kitchen.  

We're starting with the drain issue and replacing the door.