I steer clear of anyone who gives one size fits all advice.. 

I like to listen to them in my car when I'm driving to properties and I can get through about 1-2 large size books a week if I'm really focused. 

I thought it was a one size fit all situation? 

What is clear is he added a lot of value as evidenced by what he sold it for but that size rehab and adding an ADU was a lot of work.  

TIAA lot is going to depend on the value/loan size and whether the town in IN is going to be considered rural or not by DSCR lenders. 

I usually start at www.fultonassessor.org to get basic info on the property such as size of lot, size of building, year constructed, beds/baths, assessed value, etc.

Although there are companies who use lower standards (paneled walls, presswood floors, etc), the companies I have worked with in Florida use higher end materials like tongue and groove plywood floors, 100% drywall construction with 2x6 walls, spray foam wall insulation, granite counter tops, etc...and then we delivered them in 2 pieces via semi truck (or as many as 8 pieces depending on size and number of floors).

Save for Your First InvestmentCommon Pitfalls to Avoid:Don't rush into deals without proper due diligence.Avoid over-leveraging or taking on too much debt.Be cautious of "get rich quick" schemes; successful real estate investing takes time.Don't neglect legal and regulatory considerations.Remember, everyone's journey is unique, and there's no one-size-fits-all approach.

Some niches allow you to scale but you get negative momentum as you grow.My niche for the last few years has been small and medium-sized mobile home parks, I don't like RVs very much, I like to keep it simple.What other niches within the manufactured home space are you guys finding success?

That being said you are in a great situation with the size of your income.