Also, the tenant trashed the place (He clogged the toilet and left a huge mess behind - I'm afraid he was using cement to do it).

They would know if the area where your house is located has aggressive enforcement of permitting.Much like getting a dentist's advice about your hip replacement surgery.  

Cement patios and porches to reduce mud/dirt brought into house.

There are certainly worse things than knowing good carpenters, plumbers, & cement guys. 

Work includes:- Obtain necessary permits- Remove concrete where needed for excavation- Excavate along the basement foundation wall and haul away soil- Remove the existing drain tile line and downspout line- Once the foundation wall has been exposed, cement parging will be used on any areas of foundation where the block isexposed.

If you're subbing out the tiling, who's putting in the cement board underlayment (CBU) surrounding the alcove (assuming it's an alcove bathtub)?

We are not exactly sure where the water is coming from and so my question is whether or not I should try to just to Drylok the walls and then seal the cracks in the basement floor with hydraulic cement before paying that price?

I leased medical condos to Family practice, Dentist, Pediatrics and OB/Gyn in the same building.

Lets call that the :( side.2) And there is the happy side... passive income (syndications, passive partnerships ie medical/dentist offices) and passive losses (depreciation, bonus depreciation via cost segregations common in syndications).

There was a well known dentist in the area that was great at what he did and had a very successful practice.His office was always busy and patients are always happyOne day, one of his equipment failed and he could no longer get water pressure and suction.He starts to panic, because without this equipment he can't start any procedures.Time is ticking and people are waiting and waiting.