Remember, no system is perfect, so avoid the temptation of constantly chasing after the next shiny object.

As a newbie, it is easy, and common, to head down multiple paths chasing shiny bright objects, with many of those paths just leading to time wasting and increased experience in learning what you don't want to do.

Assets identified in this study include:Bathroom Fixtures: Bathtubs, vanities, showers and toiletsStructural Components: Drywall, wood framing and interior partitionsBuilding systems: water heater, electrical distribution, HVAC, plumbingInterior Construction: Wood flooring, stairs, ceramic tileSmoke detectorsThis 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.

Anything you do is fine since the objective is not higher return.  

I know everything may not go as planned but the principle and goal is the same.

A better approach might be to find a REI Association in the area(s) and ask other investors for their recommendations - it's not uncommon to choose a different appraiser depending on the type of property (residential vs commercial MFH vs. office or industrial) and the objective of the appraisal.

The act of raising the rent can make some tenants move out of principle and if you don’t have a large tenant pool, you’ll just lose money. 

It also tracks who is in what house and all other resident info I might need, and is absolutely vital to our operation.Each of our houses has a live-in manager who, for free rent, ensures all residents are following a strict set of rules and guidelines that is enforced quantitatively with a points system to ensure objectivity and uniformity between managers and houses.  

Standard heloc cost on a 100k @ 5%, 10 year term(int and principle)= 67k in interest.  

It seems your objectives are to save on taxes and protect yourself....but none of what you propose accomplishes either of those objectives.