There are other time, energy, and capital to deploy as dimensions to consider where and what to invest in. 

You might have a challenge with tenants/customers feeling uncomfortable next to a prison so getting the local insights might be valuable to you as well. 

Maybe some specialty programs exist for prefab homes or a custom ADU builder might have his own lender partner they could refer you to... but unless you yourself are an experienced home builder with a track record in ground-up construction, you're basically looking at a hard money or a HELOC.

I've seen some where the screen does not open while others have the classic squeeze-to-open.I ask because if they do not need to open I can build them myself but otherwise we have weird dimensions and will have to pay $$$ for custom...Thanks in advance!

Alternatively, I could go with a custom design; what should be a ballpark price for all architectural and construction related plans?  

A super basic step one would be to set up a "newly listed within the last week" custom search on Crexi, Loopnet, whatever.

Friedrich, I'd recommend starting with high level strategy and work your way down to granular tactical action steps which will help you identify where to focus time, energy, and resources.On a more tactical note, with $50,000 it will likely be very hard to find deals that cashflow in bigger metro markets like Charlotte, Raleigh, or Charleston.

@Forrest BrownWeight in the factors of investing out of state with travel, time, and energy to invest. 

(This simplistic one will normally get around privacy issues since you don't request names).Bad: I would like address for all your customers.

The key is not every custodian is right for you, some have higher fees but better customer service and some are good at real estate and notes and others not so much.