No hidden costs, no surprises.Flexibility is Key: With Baselane, you have the freedom to choose the features you need.

@Ike Okwerekwu Recommend 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.

.: There are sources to obtain the financing you want to buy more property.

Those are some keys I think to my own ability to thrive. 

I stopped reading after reading your subject line...know this:The #1 reason why landlords fail is due to their failure to manage to the lease (Source: American Apartment Owners' Assn). 

Anyone have any good referrals for any of these sources that are geared toward or accommodate investors?

You also need a good source to acquire the properties at a discount. 

Plus the infrastructure is growing, Section 8 is a great source for tenants, and there is a bunch of large employers there.

They know how to underwrite deals, so if the numbers pencil should be a good capital source. 

And what is your price range and are you looking for turn-key properties or something along the lines of a "fixer upper"?