... soil contamination, airborne particles, neighbors, worker safety...

This is where I believe you can make a majority of your wealth; though, it's important to have healthy cash flow to keep everything operating.

Get some exact numbers for the well- the number of feet you need to go down, the soil type and quality of water all matter

I think Newberry Springs was where that movie was about with Sandra Bullock where the electric company dumped crap into the soil and it contaminated the water in Newberry Springs, caused cancer and killed people.

We would like to be able to establish a healthy target to save for the downpayment, closing cost, and rehab so we have the funds we need to do the work that needs to be done.Any general rules of thumb or general guidelines would be extremely helpful.

I've been lucky enough in 2021 to build up some healthy profit in both the LLC (real estate business) and my architecture business that I will have some to invest still this year. 

I’ve seen all kinds of unexpected things, even new builds with sewer line issues, so just because the property is 15 years old doesn’t mean the sewer line is perfect or doesn’t need to be inspected (especially if the property is in Texas, which has a lot of areas with expansive clay soils that can damage a sewer line).

It's a small price to pay to keep your HVAC healthy and check up on the property.

Then there is the cost for the soil to fill the pool and it can be expensive plus the cost for labor to get the soil from a truck into the pool.

We are at 75% capacity and cash flowing as predicted with a healthy profit after all expenses and reserves are considered.