Here's a PARTIAL list:Office rentComputers, printers & softwareInternet & phone billOffice furnitureOffice supplies: paper, postage, ink, etc.Office liability insuranceAuto expenses: monthly payment, insurance, gas, maintenance, registration/plate feesBroker license fees: annual, monthly board & MLS fees, continuing education fees, E&O insuranceEquipment: lockboxes, signs, etc.Payroll & payroll taxesBusiness income tax preparation and paymentsLabor: answering phones, calling past due tenants, scheduling tours, taking marketing pics, processing those pics, writing ads, researching rent amounts, posting ads, explaining to owners how rent determined & showing where ad posted, opening & processing mail, posting payments, bank deposits, scanning documents & posting to owner & tenant portals, explaining accounting to owners so they understand their monthly statements, taking pics/videos of repairs, finding reputable handymen and contractors, confirming they're properly licensed & insured and tracking annually, verifying repairs done properly, processing invoices for utility bills, repairs, taxes, city inspections, scheduling periodic property evaluations/inspections with tenants that don't want strangers in their homes, explaining to owners why taking so long, and more & more & more...

They are snoozers that in my opinion would not be the first choice of a sophisticated investor. 

You are considered to be a “sophisticated investor” against an “innocent victim”.

Realize all these states do t have state payroll taxes.

Payroll can while out your profits.

Betting that is going to happen again while new smart participants have entered the market(sophisticated players like black rock) and retail (everyone who watches finance youtube knows about real estate) I think is a foolish bet.

Which we only run payroll through our construction company.

Has anyone hired someone on payroll to oversee their personal portfolio?  

If you are using a payroll service for your employees there is likely a prefered vendor for background checks.

They have admin people on payroll to handle tasks that can be handled by trained people and spend their time at higher level tasks3.