I think these are most useful tools and tips for us all.  

What do you do to revenue predictions to account for the fact that some owners don't set prices high enough to the market rate, or set them to high and don't get booked as much?

are you looking for short term loans that payoff every 6 to 12 months or longer termthat will determine which direction you may want to go in. probably not enough to do much in CA to start unless you want junior position which is highly risky for you.

There are some construction loans that will fund up to 90% of the build costs with qualifying income but again my debt is just so high because of these other mortgage payments on my credit.Somebody help give me the answer I'm looking for so I can create this unique stay!

:Class A Properties:Cashflow vs Appreciation: Typically, 3-5 years for positive cashflow, but you get highest relative rent & value appreciation.Vacancy Est: Historically 10%, 5% the more recent norm.Tenant Pool: Majority will have FICO scores of 680+, zero evictions in last 7 years.Class B Properties:Cashflow vs Appreciation: Typically, decent amount of relative rent & value appreciation.Vacancy Est: Historically 10%, 5% should be applied only if proper research done to support.Tenant Pool: Majority will have FICO scores of 620-680, some blemishes, but should have no evictions in last 5 yearsClass C Properties:Cashflow vs Appreciation: Typically, high cashflow and at the lower end of relative rent & value appreciation.

but if they cannt afford 20% down ($60K), they are a high risk of not making payments; and there are legal costs to foreclose and get your property back

I don’t think this is the quality of guests you are looking for.

You can't give up even after days/months of not producing results, which is highly unlikely. 

If the loan amount exceeds $1M, then rates are in the high 6's to mid 7's. 

@Kyle Klineall great questions and this is the challenge right now with both prices and rates high.