Scotia Bank in Costa Rica will allow you to open up an larger account as 'business owner' if you own your properties in an LLC but the process of opening an account is much more difficult. 

You do a 1031 to a new, larger property with even more depreciation.

You have the tools and mindset that work with larger scale commercial so I would network until you meet someone who may let you run some of their deals with them and see what they look like in person.

Tough last name to have in the land of the Golden State Warriors ;-)I have a client in Kansas City, MO that has done something similar with one of his larger homes.

@Kenny BaoTypically, larger properties are sourced through brokers.

At your next base do a larger home and again use your BAH.  

There are new construction homes about 2-3 miles away going for 190-200,000 but I think they may be a bit larger than what I am building.

I've had them long enough to keep pushing up rents so that I am at the top of my niche, but know not to exceed it because I'm just about at the point where if I raised rents another $50-$100 I'd be crossing over into the lower end for larger units.

Network in person, see if they have a publication where you can post your deals and what you are looking for, and if there is a larger annual conference for investors locally consider getting a vendor table to talk about your business and what you are looking for.

Would it be buying more of the same type of properties or expanding into larger properties?