Electrical and plumbing vary a bit more.  

.), or sales person at an equipment rental company who rents equipment to developers,  or real estate agent, or work of some kind at an electric utility company who provides electricity to new neighborhoods, etc.For duplexes / triplexes consider working at a hardware store/lumber yard in sales or stocking items, or in any residential construction trade (concrete, lumber framing, plumbing, electrical, drywall, etc.) or as a leasing agent or maintenance person at an apartment complex, etc.Anything related to the goal of developing land and designing and building or selling homes would be helpful.

Upgraded electric, added forced air a/c and ductwork, and new plumbing.

Upgraded electric, added forced air a/c and ductwork, and new plumbing.

For example, if you have a small water leak in the basement somehow from some plumbing, you must have the plumbing shut off.

In San Antonio you are allowed to complete some plumbing items if it is a home that you will be living in, but require a licensed plumber for flips.  

What was strange to is that the plumbing/water tank issue was not addressed on MLS listing.  

You can buy test kits off Amazon.The remediation company's job is to find the mold that's there and get rid of it, not to fix the underlying cause of it, which is usually some plumbing issue.When I did this, the chain of events was: Remediation company comes and opens up the wall and does their thing to get all the existing mold out. 

Im estimating around $2000 in renovations (I’m an electrician and have a friend who does hvac plumbing so it’s mostly material cost.

Many homes that have been vacant for long periods may need new plumbing.