Would be able to put 25k down on the deal, and taking a 40k loanAssuming 40k, 5 year loan with 4.5% interest it would be ~745$ a month paymentsSo if i assume 40% for management, vacancy, repairs (is this number accurate?)

Zillow does not have totally accurate information and realtor.com is a direct feed from the MLS.As far as the criteria, it is going to depend on your area.  

You can not accurately value a property based on the registry of deeds.

@Curt Davis  I agree with your premise on running the numbers... if investors are buying in these markets that are well known for stable pricing IE not much if any real appreciation .." you should not expect it and it should only be a bonus "  we hear that time and again someone must have coined it and so these investor repeat it LOL... but if that's the case then building a ROI porforma and throwing in any kind of appreciation is not going to be accurate.. the only real appreciation that I have seen in the 7 markets I personally work in is on the wholesale side were you guys picked up houses for 20 to 25k before rehab.. now they are 25 to 35k.. and that generally has not translated to any benefit for the long term buy and holder.. they will always be competing against the very organized sales outfits like you guys.. so there is no way they can sell a home for more than what ever you or MI or any other turn key company is selling it for your all fishing out of the same barrel.what the turn key buyer wants to keep in mind is just like our thought process out here on the west coast were break even or even a little negative is just fine and dandy.. your tenant is paying your house off your real profit or gain is when your properties are paid for and someone else has paid for it.. to me any spendable cash flow on a rental is TOTAL gravy and over a long hold period you pump a lot of that back into the home as turnover and cap ex on rentals is far more than any proformas .So in my mind Turn key  for the WHY mid west has  that @Joel Owens is wondering about.1. simply the new starter property choice for those priced out of their own markets this is the number one driver.. 2.

It's never 100% accurate though.The clients that I have the best relationship with, and the ones that pop into my head when I see a great deal are the ones that understand we are a team and don't just leave me with a broad range that I would spend days sifting through or even worse "I'm just looking for good investment deals."

Interest rate, terms, origination fees, prepayment penalties, accurate rental rates, vacancy rates, costs of repairs / make rent ready / c of o etc.Leverage is good, if used appropriately

Apologies in advance if my terminology isn't 100% accurate - I am still learning.I am a total newbie, I have completed only one buy and hold deal in Los Angeles (duplex).

Hi, complete newbie here ... what are some good resources for one to learn how to accurately determine the ARV of a home?

I need to find accurate comps.

How accurate is the 50% rule?