Typically over 5+ units 25% down is optimal but 20% is possible..I don't think I'd recommend a property management company for your search, likely a multi family focused investor RE broker and strong nationwide lender.

There's so many catalysts for population and job growth (Intel, Honda, Amazon, Nationwide Hospital, etc).

We lend nationwide, and purchase existing loans nationwide.  

(National Real Estate Insurance Group)  They are nation wide and have good rates.  

You need a lending and securities attorney.There are some West Coast-based lending attorneys who work nationwide that I have recommended, but you might ask around regionally first.

I primarily operate in Pinellas County, FL and Pinellas Realtors has a site with every localities rules and contacts.I am not sure if you are looking statewide or nationwide but there are likely sites that can zero in on an area and help break it down and then you can call and independently verify.I also recommend Municode.Good luck!

You may also check out Chris Piper's thread (I posted a link to it in my thread (https://www.biggerpockets.com/forums/93/topics/1197244-how-to-do-wholesaling-right-in-maryland-east-coast-and-nationwide) .

Specifically, there's job growth (Intel, Honda, Amazon, Nationwide, etc) and the population is growing (unlike Cleveland or Cincy).

Nationwide Mortgage Bankers is based in New York and lends nationally. 

Right now we are looking at Detroit Area We lend nationwide.