@Cosette Trantow (to tag put the @ sign in front of their name and it will populate :)Here is a great online calculator that can help you - I have found it very helpful.  

As far as lenders go, are you looking to go the online or remote lender route?

Landlords downloading a generic lease online and assuming it will work. 

I have no clue on where to look online for good listings please give any advice on how you personally found the right house, apartment , etc

I had fancy UC Berkeley online library access, so I did what anyone in that position would do and read all the peer reviewed academic literature on bed bugs written by people with Ph.D after their name (including pre-modern remedies that worked & still work), and over the course of a few months eliminated the infestation myself - chemical free.

@Christian Wamsley you will have access to shop properties online while you are overseas, but this would just be to keep an eye on the market.

If you are in LA City limits you can find a lot of good info here.http://zimas.lacity.org/And here.http://ladbs.org/If you are in County territory they have info online too.

This can lead to discounts and extra perks as they will witness your commitment in building relationships within the real estate community. 

The title rep can give the realtor online access to their title companies online platform whichit makes available to its customers.

So if I get let's say 20 properties, and I'm managing them under some online software system, doing the accounting through quickbooks, should I keep separate bank accounts for each property?