We've replaced 5 water heaters in a single year, had plumbing stoppages that resulted in 3-5k worth of work, and even had to replace 1/3 of the pier and beam foundation in the house we're currently living in.

A company comes out twice a year and inspects the AC and replaces the filter (very important if in a high temperature area), inspects the plumbing and electrical, and provides feedback regarding any potential issues.

What I had in mind was having a builder handle foundation, framing, roofing,electrical, plumbing, etc.

The plumbing was shot, so we gutted the place and began from the foundation.

It has electrical, but no plumbing.

Also remember it will take time to get them done, during which the home is vacant and not on the market.People shop with their eyes-so many don't care about stuff that is really important (plumbing, electrical, roof, etc). 

New mechanicals (HVAC, electric, plumbing), kitchen, bathroom, adding a 1/2 bath in basement or 1st floor, new drywall, floors, paint, etc.

Landlords cannot evict tenants or threaten to evict victim tenants for domestic violence, abuse, or sexual assault.

Rehabbed most of the stuff myself except for supply lines in the plumbing.

Insulate, add electrical, mini-split ac, and possibly plumbing, as desired, drywall, tape and paint, put built-in cab's on one side if you want, hang the tv, speakers, etc, install bi-fold/multi-fold doors on the side leading to a patio, and replace the garage door with an insulated one keeping the track and removing the motor, or install a carriage type garage door into the existing garage opening.