For the last couple of years I have been working from home for a very good company so I kept moving the financial goal posts because I wasn't miserable. 

Yes, our property management company handles STR, MTR, and LTR units.

These companies are fly by night hence why they don't buy their own properties...

There's little to no benefit to the owner and the person running the arbitrage is missing a very obvious, much simpler business opportunity- just start an STR management company and operate as such.

Currently, I'm still buying, flipping, and running a PM company. 

They tend to stay to themselves, not a lot of company or complaints. 

Or using a company ?

Overland Park, KS vs Kansas City, MO) Very landlord friendly, worst case eviction is usually 8 weeks + $500 + lost rent (cannot comment on individual cases and this is not legal advice) Large diverse metro area - variety of jobs, companies, people can have a career in KC.

I have spoken to both a mortgage banker and a modular cabin company and explained our situation.

You'll want a title company/closing attorney who understands how to do this correctly.