After that, I would encourage you to go to your county recorders office / court to request data yourself.

I’d look into historic appreciation data for the area before making a decision.

With this set up, we were able to get a DSCR loan through Kiavi with only a few extra steps compared to an LLC.  

Out of the 20 letters I've sent, I've had 1 guy get back to me and we were in discussions but weren't able to find a price that worked for the both of us.The issue is that I only have a few houses on my mailing list so far (just places I've walked or driven by that caught my attention), and blindly searching every street and address # to see which houses are actually legal multifamily will take forever and doesn't seem efficient.I know the data is publicly available, I just don't know how to aggregate it in a way that would be efficient and useful for blasting out marketing mailers.Are there any websites that can pull massive lists of all multifamily houses in my area?

Have good data and comps. 

MTR is treated like an LTR from what I understand and I already own a couple LTR's so would rather do more of those than an MTR and avoid the extra hassle of furnishing, etc.  

@Clifford C Toth No, I don't rent them furnished, although in my market you can get an extra $50/BR for doing so.I have a 3rd party do the lawn 2x/month.

I am working on what to fill the extra time with at the moment.  

Some tools myself and others have used: - Skip tracing- Mailers- Data aggregators like PropStream, PropertyShark, etc. 

It works great for wholesalers who sell the deals to a flipper, so a flipper can reap the rewards by going the extra mile and conducting their own marketing