Your specific variable expense assumptions are wrong, BUT you stumbled into them being correct overall.Also, you are approaching this correctly - entering in the numbers to generate a purchase price that meets your metrics:)

Small multifamily is how I got started as well, specifically duplexes.

What I like about it is the fact I can reach out to them when I have specific questions about a topic or if I wanted more details.Information like this can be found through reading REI books and scourging YT videos.

Would be very interested to hear from experienced investors on your thoughts for these two areas specifically.

On top of this if at all possible I’d recommend choosing specific neighborhoods to become an expert on as opposed to just thinking “anywhere in the San Antonio market could work”.

They not only specialize in self-directed IRAs and solo 401(k)s but also have an entire team specifically dedicated to supporting BiggerPockets members like you.

I would think that a property manager would be able to assess your specific unit, be able to determine what market rate is for the local area and the quality of the unit, what the market rate rate is for your specific unit, to suggest what your unit could rent for based on some improvements and have a sense of what rent increase would be tolerable by the tenants. 

If you have specific questions about property management, I'll be happy to help!

You have to do some work to create real estate specific "Classes" and expense accounts for QB.

I wish there was a system for searching for STR specific things but I have only found something like AirDNA to be the closest even though it's far from ideal for that.