So you might want to do a test patch. 

However, this initial plan slowly morphed into "we're not gonna use cement for the support columns since the foundation is pier beamed..." to "now that we've removed the wall and put in support wedges (instead of jack posts) and nothing collapsed, we're gonna patch everything up."

However, it kinda sounds like you are just patching on patches--or you need to trade in your handyman for a licensed plumber (or someone who can get it done right the FIRST time.)  

The HVAC guy recommended waiting a week before officially patching the holes to make sure the unit doesn’t leak again.

I bought all materials.1 - 10'x6' shower remodeling (remove old bath tub, toilette and vanity) , replace door and vanity. install Vinyl with molding and paint 2-  19'x11' room:  install vinyl, molding, replace closet door and room door paint3- 19'x13' room:  install vinyl, molding, replace closet door and room door, paint4- Kitchen: 6'x10' patch walls, floor with vinyl, install cabinet, paint5- living and dinning room: 19' x 23', install vinyl , molding and paint I really appreciate your feedback.Thanks,

Many of my long term rentals are in the Texas oil patch, though we were targeting an Air Force base for tenants.  

The number that didn't go into bankruptcy once that "temporary" financial patch was blown through.

Get to know them and they would happily change out a water heater for $200 bucks or fix a water leak for $30 bucks or patch sheetrock for $30.  

@Charlie Moore yeah but it's because my rental was and absolute wreck and i was really questioning my "investment" decisions laying in 6 inches of water patching pipes in a blizzard.With tennants though it's not worth the stress.

If you find a deal where the numbers work, you're not stretching yourselves, it's in a decent area where people would want to live, you don't mind sharing the house with other people, AND you are handy with self repairs and won't be overwhelmed with common (not necessarily frequent) plumbing, patching, and painting issues, I'd say it's a great plan.