If I had property management I would be paying a couple thousand dollars each month for that service, then having to still pay the PM Company’s contractors at a marked up rate for every repair.

As I look at my company's pace report, most properties are merely reverting back to 2019-esque numbers. 

Good companies have problems. 

Not only do I mentor my students, I also have a very successful company Florida Homeowner Solutions that keeps me very busy.

I was an investor first but now manage a property management company in central CT.  

For years I put in all my contracts that a specific appraisal company could not be used for the appraisal of any deal I was doing because their results were consistently so low it was laughable.

If you want to PM me the address and info I can give you more specific opinions on the property and what this turnkey company is telling you about rents.

I may be wrong, but it could be that company having bought 2011-2015 taxes is forcing tax foreclosure and thus it's only based on those years.

After giving this vendor a $15k deposit I started to get some weird vibes about them and called the utility company.

You have $1.5+ million home and you're paying $2000 property tax a year, probably a paid off mortgage  if you bought in 1970 for example, and can charge market rate rent (multi units are under rent control with existing tenants, generally speaking, but not SFHs so far) Be really careful with whoever gives you numbers on a spreadsheet whether it's a turnkey company, agent etc.