Most property managers don't charge any markup.

You can start by going to www.narpm.org to search their directory of managers.

I am under contract for a property out in Columbus and they are one of the few property management companies I am considering going with! 

Even with a property manager taking a percentage, you’d still see a return, and it might save you a lot of stress managing the property from out of state.

Does anyone have any referrals for property managers in the Los Angeles area who specialize/ have experience in mid term rentals? 

We have a STR managed by a property management company.

I have purchased an off-market property from an investor who now wants to sell the rest of his portfolio.

Quote from @Khaled El Dorry: I have a portfolio of 3 SFH's (2 in Jax and 1 in ocala) and 1 duplex in port charlotte (never flooded or damaged due to hurricanes) that have done very well for me.  

There is no "perfect" structure out there but I've tried a lot of different ones within QBO over the years and this is by far the best I've found.I use this structure for my own portfolio as well.Hope that helps!

Can you recommend a management software for managing 100+ doors I tried Cozy.