My largest electric bill has been $12.00 Roof inspector did not do a great job this time.

It is currently my largest stream of passive income.

But as I get into larger properties (my current largest is 24 units), it seems like the game changes and I need to be doing different things than I was with my duplexes and quads.How do you do your due diligence for larger multifamily properties?

However, a very simple technique is to ask the seller to take out the largest mortgage possible and then buy the property subject to the mortgage.

The fact that it is the 4th(soon to be 3rd) largest city in the US and that the average home price is around 280k, makes for a great real estate market. highly recommend looking into Houston as an investment market for flips but especially for buy and hold @Brint DeVilling

If your real estate mentor friend isn't licensed in these areas then they won't be able to represent you, but BiggerPockets is the largest real estate social network in the world and you've got ample networking opportunities here to fill that gap.I'm not a real estate accountant or attorney and you should consult with one before following my advice. 

Yes, all three might be present in the same property, but all three are distinctly different.Real estate is full of realtors that will tell you the sky is red and somehow get you to believe it.

They seem to be the largest PM in Killeen market.

That area might be one of the largest markets for short term vacation rentals in the world, and the prices to hire a management company are very reasonable (read: competitive). 

I have been an landlord for 13 years and have spent a lot of time learning about maximizing my income.There are two law firms in Denver that do 90% of the evictions @Jon Holdman mentioned the largest.  2nd largest is done by Deborah Wilson.