With a budget of $300K-$400K, you could potentially find single-family homes or small multi-units in those areas.I'd recommend researching rental demand near universities like Duke or NC State or even checking out neighborhoods with strong job growth near tech hubs.

You have received some great recommendations and if you are yet to decide on an Investor friendly to work with, you can send me a DM and see if we are a good fit.I do provide free mentorship and a lot of free resources and connections to anyone I work with especially beginners like you. 

Quote from @Eyad Ahmed: Starting my Virual wholesaling plan from egypt is quite challenging but doable i'm targeting indiana market with an established LLC and the deal machine software and mojo dialer and a presence whether on social media, a website,etc  looking to connect with realtors as I'm looking to start novations as well alongside wholesaling any recommendations about my plan or tips and trick's on how to close my first deal, also if there is any buyers in, fort wayne, indiana polis,munchie drop your email to add you to our end-buyers list also any recommemdations of title company that deals with digital banking for example: mercury,wise,relay and is investor friendlyI am the owner of DealMachine and also have 19 properties in Indianapolis.

I would recommend anyone that gets started has at least a list of 10,000 to ensure they can get 1-2 deals that first month. 

Or are there other methods you’d recommend that could align better with my goals?

Here are my recommendations:1) Check with your insurance broker first. 

I recommend that you speak with a real estate accountant to see if you will benefit from a cost segregation first. 

If you need to stay in DC for employment than I would recommend house hacking something, although I'm not sure how far 50k will take you there.

Does anyone recommend knowledge sources on building a mobile home parks (websites, books, organizations, plans, etc..). 

I recommend you include some of your key qualification criteria in the advertisement.