@Joseph Chiofalo just helped with a 15% down DSCR for a 4plex for a repeat first time investor client.

Is there a way that I could submit properties to someone and pay them for doing the comps for me? 

I have experience raising capital for down payments if you are prepared to pay investors at this level.

While opinions of well meaning referral sources are helpful and I could give you names and numbers, they are also highly subjective.I doubt there is a property manager active in Cincinnati that has not had one client sing his praises and another quit in dissatisfaction.

Maybe there are some things that i should pay more attention to, anything I should consider/calculate upfront which for other investments is not necessary?

I can pull a HELOC on my investment property in KY, pay outright with cash or finance through the installation company.

Haven't seen the other two come to fruition...or if they have, I haven't found out.Demand might be really high right now, but it would likely be dominated by people trying to find someone to pay the full contributed capital for worthless positions in failed deals. 

If they don't pay it in full, then you continue to market it and offer it to the next qualified applicant.

To add insult to injury, every company I’ve asked for a quote based on the quote I got from the first vendor, wants me to pay another several hundred dollar service fee to come out and look at it themselves.

A TON of my investment clients come from CA.