I've had out of state rentals since 1997, and started by following others that had already done all the research and ground work - there was no reason to reinvent the wheel.

Seems that I need to buy the 14 inch rough in toilets (which is hard, because only few models are available at Home Depot and Lowes, since this is a non-standard size).

Need 3/4 inch thick plywood.

No reason to hydro jet if they are replacing , backfill and bed the pipe is not a line iten , its putting sand around the pipe 6 inches and filling in the trench . 8 ft isnt that deep , still need a trehch box , but nothing out of the ordinary .  

Presumably you can also protect against this with the aforementioned neighborhood growth trends.Everyone is trying to reinvent the wheel.

It's RE investing with training wheels.

They only need about 24 inches of depth to fit.

Any input would be appreciated. don't do townhouses that's crazy. three story walk ups. don't reinvent the wheel. make them way smaller. 2 beds, 700 sq ft. check some posts I have online I have Floorplans and elevations of the triplex we build infill for Columbus Ohio 

But the buyer would have to have a kitchen layout EXACTLY like yours...to the 1/8 inch.

The benefit is it can be sculpted to match the profile of difficult to find trim and can fix rotten patches of wood siding (up to a few inches in diameter) without pulling anything off the house.