Do they need repairs?

I'd be real concerned that you are over estimating your ARV and under estimating your repairs costs here.

I’m pretty confident in the repair estimate as of now (not under contract so no inspection), and would do most of the work myself.

Does anyone employ a separate quality check person to verify cleaning/take photos after a turn, adequate stocking, and oversea repairs?

What you can do is get out there and network with other local investors and start evaluating properties, learning about repairs, etc. 

It’s very easy as tenants pay like clock work electronically and are very reasonable for scheduling repairs.

If your goal is only to go back to the seller and try and get more concessions or for them to lower the price, keep in mind that the overwhelming number of contracts written are on the Florida "As-Is" contract, so the seller does not even have to respond to your requests for repairs or concessions.

If you are looking to broker loans - that is why many do it but before brokering a loan you need to understand how to price them, which is typically best done when buying loans - similar to real estate wholesalers, you ahve to be able to estimate repairs and work backwards, with notes you need to also know how to price them and undersatnd collateral.

Both options are good, but ultimately it may depend on location, opportunity, and how much money you're able to save up and/or are willing to earmark for repairs.

Revenue stream NPV,  Capex repairs, NNN.