I figure that an agent who can help would have recurring income from buying and selling these deals.      

NMD deals do work with businesses as well and is structured using the assets, receivables or recurring revenue.  

This seasonality is definitely a recurring thing in real estate annually.

Enter recurring charges and automatic late fees.

Understand the differences between an operating expense (normal and recurring) and capital expenses which are infrequent, larger expenses for things like roof & mechanical replacements and value add projects such as painting and other remodeling.I recommend talking to a CPA to get professional advice.

While cozy doesn't necessarily offer weekly recurring automatic payments, it does allow tenants to make manual payments at whatever interval they'd like.

Any recommendations on choosing a custodian and what are the typical set up costs and recurring/annual costs?     

Enter recurring charges and automatic late fees.

Especially because something like this will most likely be a recurring issue considering the property is near water and you can find a property that's closer to you in Atlanta. 

Enter recurring charges and automatic late fees.