Quote from @Samuel Kim: Hello i am a doctor who wants to use cost segregation/bonus depreciation on my 9 rental houses, my home maker wife wants to meet the 750hr test to obtain real estate professional status and material participation.

Mainly the "self sufficiency test". 

They tested the appliances thoroughly and offered a one-year guarantee.

Lead paint testing requires no supervision or follow-up inspection.

Once you have a shortlist, sign up for an account with each one and test them extensively to see how they function.

This could cost around $500 to $1,500 per unit, depending on the size and complexity of the project.Certifications: There may be additional costs for certifications (such as HERS ratings) or third-party testing to verify the energy efficiency of each unit.For a 90-unit project, you could be looking at costs in the range of:$45,000 to $135,000 for energy modeling and certification (depending on the cost per unit).For a 112-unit project, the costs would likely be:$56,000 to $168,000 for similar services.Tax Credit Calculation:If you meet the energy standards, you can claim up to $2,000 per unit.

When analyzing properties, it's helpful to run a rental stress test to see if the deal can withstand unexpected challenges.

My main goals with these initial projects are:1.Gaining valuable insights into the local market.2.Getting hands-on experience with out-of-state investing, particularly when it comes to remodels and managing from afar.3.Testing the entire BRRRR process to see if it’s the right strategy for me long-term.If all goes well, I’d love to scale up and explore multi-family projects.

For the son to qualify for the $250k exclusion, I believe he would most likely need to meet the ownership and use test, meaning he needs to own and live in the home as his primary residence for at least two of the last five years before the sale.

Seems interesting run a split test see if it works out for you.