If that's not an option, you're looking at a minimum of 15% down for a single family investment property.If you haven't been working, you'll want to wait until you have a 2-year employment history UNLESS the job you have after college ties into what you're going to college for. 

I've never had a single complaint from any of my STR guests regarding not providing streaming services.Also, be sure to set that expectation up front in your listing - let guests know you provide high speed internet and have smart TV's so they need to bring their own log-ins if they want to use any streaming services.

We have two multifamily properties and 3 single family properties. 

I have a couple of single family homes in Cincinnati, but most of my portfolio is in Columbus.

., "I will buy at least one single-family home, duplex, triplex, or fourplex before the end of 2019") and then do it.

Single family, 2-4 unit? 

If you house hack a single family residence by renting out  a room or two then you would have no property tax but if you buy a duplex you might have to pro-rate the property tax.  

another single family home?

Every flipper has found themselves at Lowe's for the fourth time in a single day, picking up yet another piece of material for a project.

I personally like Alabama and Tennessee a lot, depending on what specific area you're looking at.Look for Class B or C properties in stable rental markets, particularly single-family homes or duplexes.