Do these properties really make for happier healthier people? 

It great that you have four properties and have done research to explore possible solutions.We are all work in progress.Listening to other successful investor stories, helpsLearning to "embrace" rather than to" avoid" is the way to go in networking, being "successful", real estate investing in general.Sheldon Adelson, billionaire, Las Vegas Sands owner, said "change the status quo....do things the way other people don't do them...then you'll be successful"Doing things the way other people dont do them, makes us contrarian.....but holding steadfast to sound investment criteria as Warren Buffet suggest (calm temperament) gets us through to success

Our max will be 90k, as that is a much healthier rent-to-purchase price ratio.

I think there is a some considerable blue ocean in the 15-80 unit space for investors who function as operators and are willing to embrace the pain of being quite active.  

Honestly though, I dont understand why more banks dont embrace MHPs.  

However I suggest that you take the time to understand the IRS rules pertaining to self-directed IRA/401k, then follow and embrace them.

Hello McKensieI really liked the BP Podcast  where THACH NGUYEN was interviewed.100 doors a day for ten years, to make USD one million per year in commissions.thats WORTH ITAs investor/agents we need to reach a large volume of potential sellers to eventually get the few who we do business.Its about embracing adversity/rejection as part of the journey to success.

Maybe I'm embracing this because I've just walked away from the small business, crew, and network I've managed to create so that I can geographically relocate for family reasons.

Embrace your passions and feed of your curiosity to discover the niche in real estate that really calls to you!

I’ve embraced my skills and knew that I wanted to be involved in RE, and this seemed like a good starting point from where I am in business and life.