@Alex NARecommend exploring as many sources as possible to get referrals AND cross-reference them to get as much accurate information as possible.Check out NARPM.com, BP’s Property Manager Finder (BiggerPockets: The Real Estate Investing Social Network), etc.Also, encourage you to learn from the mistakes of others - by reading posts here on BiggerPockets about owners not having their expectations met by their current Property Management Company.

I could also take the money from another source, but wouldn't be able to carry the 2 mortgages on personal loan I don't think.

Those states have "income source" as a protected class and as far as I know are only the west coast (CA, OR, WA) and the new england area (MA, CT, VT, NJ ect) Account Closed  In most states you are not required to accept Sec 8, and as such if you choose not to you could deny processing an applicant that is using a voucher.

If nothing else, they are a good source for understanding what you may not know.

I recommend sitting down for an hour and learning how to develop a simple model in Excel yourself.When looking at properties you will often time have edge-cases where there are unusual sources of income and expense that might not fit in a calculator like this.

I see too often that aspiring investors think real estate will be a much more passive source of income than your job, but I can almost guarantee you that you will extremely active especially when starting out. 

California will generally tax any income earned in its state and sourced to its state. 

How are you sourcing your deals? 

Note that CA tends to have higher tax rates so if CA taxes $10k of rental income sourced in Ohio at a 9% rate, but you only paid, say, 4% to Ohio, maybe you'll get a credit for the 4%, but you're likely still paying the 5% differential to CA. 

Key source for sure.