Best to install a unit to run all the time and to drain itself.

Upgraded supply and drain lines for the dishwasher?

yet took some rather odd actions.For example:Board started digging drains in front to of my house without ever acknowledging my engineer's letter about the damp, or coming in to look at where it was coming in.This was not recommended by the engineer.Meanwhile, I was waiting for funds to replace the carpets and while delays went on I had to move out the house because of the risk of mold. 

Now I have plumbers to work with and tenants that dump cooking oil down the drain.

Make sure you include all costs - sheriffs, movers, storage, etc.Normally I'd want to know a lot more about the basement flooding, but since you've said it's a demo, I'd let it go and address it with drainage and/or french drains when you rebuild.Good luck!

What you need to do to fix this is a surface drain around the section of the building that lower than the house and divert it away.

I never want to really make someone mad and have concrete poured down the drain. 

Too many people think they can sign up with Zillow and watch the buyers pour in but the truth is you're just throwing money down the drain.

I suspect you would have trouble proving anything and a lawsuit would be more time and money than just installing a drain from the wet side into the sump well.

You'll be dealing with vomit, dirty toilets and sinks, clogged drains, drywall repair, double or triple occupancy in a single occupancy room, dealing with the people that are the causes of the aforementioned things, and probably complaints from neighbors.