But from further research on how wholesalers do business, I have realized that the house hacking method (FHA 203B, 203k...etc) is not ideal when dealing with a wholesaler.

Better looking for 3-4 units (2b2b ideal) situation. 

I think @BOB CRANEY hit the nail on the head  its the area .. my folks i deal with in these areas.. fico is not a criteria.. its do they pay their cell on time.. are they felons.... you have to triage the bad credit or sell the house. 600 up probably does not want to live in that area. 

Think of yourself more as a Business Development person... you could do well

Plus it mitigates the risk of only you having the financial burden of financing by yourself and develop relationships Let me know if you have any questions.

Would it be ideal to finish the cabin (I’m thinking it’s going to cost about 20k to finish it) and put renters in it to start bringing in cash flow and then mortgage the property to take that cash and invest in other properties?

For moving there as a primary it depends on what you are used to but for investment purposes depending on where you are there's forms of increased development and is a marked for gentrification.

The truth is, there is no ideal investment strategy, but knowing what you want to get out of it, the capital you have available, the time you have available to invest in the research etc. can help you decide which way to go.Keep asking your questions in the forums!

There is a large amount of new development for these types of properties going on in this area but also a lot of previously existing units. 

A four-unit building would be ideal, but I have not found many in the Charlotte area online.