There was a learning curve about investing in Costa Rica and the costs associated with it and financing and everything else.  

Each closing, whether multi-family or single family, is going to have some of the same costs: title insurance, attorney fees, inspection fees, appraisal fees, fees associated with financing, etc.

My best appreciating properties have appreciated over $10k/month over the hold period.the best investors evaluate the risk associated with return.  

Sub30k seems to fit this bill, although I recognize there is also substantial risk associated with it when done improperly.

At the moment with 3 rentals (6 total units), I have one account and a credit card associated with it.

In this manual (which I assume could be modified to provide to tenants) I include all the financing information (which you would not include for tenants) bank accounts, mortgage accounts, payment information, and mortgage payoff), a list of the contractors, what each contractor does, a list of upcoming planned or necessary repairs, and a copy of all leases associated with the property.

He has even helped an associate of mine who was hospitalized the week she was taking Master Broker.

That said, the increased rental income typically associated with POHs vs TOHs partially offsets these additional costs, though the long-term financial implications and operational risks tied to POHs require careful evaluation.

Try networking locally with real estate groups, investor groups, rental owner associations, a local REI, etc. 

Where it gets interesting is that the house has 5 mailing addresses associated with it and the fire prevention bureau has on their records it is also a 5- unit house, and I am billed as such upon annual renewals/inspections.