Then there are some in between that may have a composting outhouse and a hose spigot, but no full electricity etc.  

I got an address for it, cleared some land and hooked up electric.

5️⃣ Energy-Efficient Upgrades: Solar panels = tax credits!

I went to a public hearing on a red card that the town fabricated because a structural inspector decided to do an electrical inspection early.

Doing DIY on plumbing, electrical, or structural.

But I'm confused/curious as to why this Electrical Contr is so willing to burn bridges over couple of grand, is he just stupid?

Assets identified in this study include:Building Systems: plumbing, HVAC and electrical distributionInterior Construction: flooring, drywall partitions and ceilingsStructural Components: doors, roofing, windows and wallsPermanent Fixtures: emergency lighting, restroom fixtures and signageThis engineering-based cost segregation study included the following methodology:Physical Inspection through a site visitDocumentation review including architectural plans, accounting records and construction documentsA cost analysis which utilizes engineering principles in order to allocate costs to their applicable asset classificationsCalculation of the depreciation schedule using MACRSAs a reminder, bonus depreciation started to phase out in 2023.

A good HI will go over your house with a fine-toothed comb.If you can find an Ex (or Retired) HI that is also Certified, that would be even better, since they will understand the structure/electrical/plumbing systems in more detail than a regular HI...

You think through the major systems in the house (roof, exterior or tuck pointing, hvac, plumbing, electrical, unit turns, common areas) and if they are all new you should be good for a few years (5-10). 

If you are doing a BRRRR and leaving older items in place, not updating electrical and plumbing, I think you need $300 t0 $350 if you are just getting started.