Seems like the sharks smell blood in the water when they hear doc/dentist wants to invest passively.One thought is to invest with a very experienced operator....returns will be lower likely, but you'll have more peace of mind vs throwing money at a newer and less experienced operator. 

Unfortunately, being that grout is a cement-like product, a cured layer and new layer will not usually adhere properly, causing the new grout to flake off over time.

The back of the house is fitted with custom viroc cement panels and pavers, which add to its visual appeal.Inside, the house boasts a cozy fireplace and spacious 10-foot ceilings, providing a comfortable and inviting living space.

I am planning on minimally finishing it out buy painting/epoxy the floor and making cement walls look nice and general waterproofing (looking for advice on that).

A concrete batching plant is a machine that mixes cement and water to produce concrete.

It all depends upon what quality of light, drop ceiling, cement drywall etcWhat size window?  

After inspection over the weekend, our inspector identified signs of water penetration on one inner wall of the basement connecting to the backward, which might be due to the gaps between cement walls/chimney bricks and the wooden siding.

The ideal property would be one that just has the cement foundation remaining.  

We use multiple doctors, dentists, etc.

Meeting the BIG doners and Medium Doners might be fruitful (The process will be less complicated if everyone is living in the same state).If someone is driving one of these, you can assume they have money vs just high income.It's a Bentley Convertible, the tops are usually Blue, or Burgundy, grey or tan.Talk to Dentists and MD's.Dress to blend in where you go, don't wear old worn out Dickies to the Prom so to speak.Then just talk to people and make business friends with them.Good Luck!