Readers: a broker is not the contractual party who is responsible to deliver the file and it's contents to you.

Wow, that last part is trending nicely in your direction.

Can we hear from individuals who have experienced sustained success buying section 8 rentals while relying on entirely 3rd party service providers? 

And while these groups help you a lot with the actual strategy, the best part is the network you'll gain which pushes you 10 times further then googling all the free stuff.

But remember that what is favorable now could come unfavorable in the future as they readjust over time.Reasons many landlords avoid vouchers include the hassle of the extra inspections, the perception of a worse tenant, and maybe the inconvenience of getting rent from two different parties. 

Not just location, but different states can have different (sometimes weird) rules like here in Texas where you need a manual third party "attorney review' on every loan doc set - adds about $100 to each doc cost that doesn't apply in most states

Loan Costs, Deposits, and Escrows: Origination fees, application fees, third party reports, legal, insurance review, title & escrow, rate caps (floating rate loans), due diligence deposit, rate lock deposit, standard escrows, etc.6.

Quote from @James Kerson: @John Warren though I’m a licensed Ohio broker, I’ve used that license exclusively for third-party property management assignments and to get the buyer-agent commission on some SFR deals.

Sorry, I'm late to the party.  

Seems to be an issue with 3rd party processors