Have you looked at calculating Internal Rate of Return (IRR)?

A bank transfer is internal to the bank and is not externalwhereas a wire transfer goes through the federal reserves system (banks are assigned ABA numbers) and takes time for verification.

Their reports are going to cost you but they are serious academic research not marketing.

In other words, look at the IRR (Internal Rate of Return) over just the cash flow or cash on cash return.

For the second point, yes, you're taking on the role of a mentee/intern.

We're part of an international MLS, so we get eyes on your home from all over the world.

@Jason Setzer Yes, meaning they do a cheaper online/desktop appraisal internally pulling comparables electronically and not sending an actual appraiser to the property.

We also just expanded the airport to accommodate more international travel.

@Martin Neal mentions his CoC return cannot be less than 17% which is a good factor to look at not just dollar amount per door.My Internal Rate of Return is typically in the 17% range and my CoC is well above 20% and I try to get at least $350-$400 per door.I have a few that don't cash flow right now but the appreciation on them has been great and we've refinanced a few times and sold a few to get a strong profit.Also, if you want a second job do the property management yourself otherwise hire a good property management company. 

Just like a company like Lendinghome they do internal valuations.. no appraisals.. and they may have a non recourse product i have not checked.. its a very niche space..