It could have been worse - have talked to others that had cement poured in the toilets and more.  

They should use a grinding wheel/angle grinder and cut straight through the grout line just above your cut tiles that abut the tub, all the way through the cement/backer board.

I've personally put in a full bathroom in the lower level, jackhammering the cement.

Real Estate is cemented as "THE hedge against inflation". 

As a first timer, I'd avoid anything built before the 1960s that could have cement sewer lines, knob and tube wiring, etc.

You taunt them and your ac gets stolen, cement down the sewer, cabinets busted, flooring ruined, etc.  

The approved plans called for significant cement column foundations on either side of the door, but the inspector wanted a sheer wall to go between the column foundations under the door.  

The basement is completely unfinished with just the utilities and foundation walls/cement floor.

(I don't recommend insulating the ceiling of the crawlspace--it will cause condensation and dripping.)Make sure there is some sort of vapor barrier on the floor of the crawl space--either thick plastic sheeting or cement. 

Then you have a huge reduction in cost when doing parking - gravel as a base over cement (like in a climate controlled facility).