School ratings, Crime, Class of neighborhoods, average annual income, percentage of rentals, types of rental properties (SFR, Duplex, Triplex, 4plex, Apartments), rental rates for each type (1 BR, 2 BR, 3 BR ...)

It really depends on the areas you are looking to rent but I shoot for hosting the highest percentage of families I can on my short term rentals.

Anybody have advice as to what percentage of money he should put up to make a 50/50 split fair?

To answer the op's question....and please anyone jump on this if i am wrong;The country is yeild starved, bonds, besides junk, pay very little, treasuries are a joke, savings rates, crap, very old bull market is tempering new money, retail and associated brick and morter are under attack by a new paridigm and will probably see a large percentage of existing sf go unneeded, industrial space, unsure, so multifamily is the only pond with some fish left!

If the primary purpose is vacation, with a little AirBNB research thrown in, then you *might* be able to make a case to deduct a small percentage of your overall expenses.  

It's my understanding that hard money will lend 70% loan to ARV for a higher percentage rate.

@Lakshay G. having low credit balances lowers your credit utilization percentage, which keeps your score higher.

It's my understanding that hard money will lend 70% loan to ARV for a higher percentage rate.

They are like injury attorneys and get paid a percentage of your claim so they fight for max amount. 

I was wondering what an average percentage would be for a down payment of a single family home?