I currently live in a small town and there is not a lot of opportunities here but luckily I'm moving to Austin or San Antonio TX or between both here in a few months so I see this as a great opportunity to start wholesaling and accumulate profit to start flipping homes and turning them into rental properties.

Assuming each house cost $50,000, and it takes 5 years to accumulate the $50k for each house. 

I've got friends who check in with me 2x a year asking if now is the time to buy, if the sky is about to fall... 10yrs later they haven't bough a thing, and I've accumulated 10 units and retired from the corporate world. 3.

If your goal is long term wealth accumulation and you don't mind continuing to manage tenants; then continuing to rent is likely a better option. 

congratulations on accumulating a portfolio of this size and your success so far. 

Lastly, Dave Ramsey's advice for all cash works for people with high-paying earnings and disregards the average American trying to dip their feet into REI.I do believe his method works once you accumulated enough properties and begin paying them off.

My husband and I are still pretty young (early 30s), so we are in the leveraging/accumulation phase of investing. 

Due to item 1, adding an ADU can require years to start achieving any return (once the accumulated cash flow recovers the initial negative position).4) Adding an ADU is a slow process.

If you want to pay all of your mortgages down as quickly as possible, then you are not going to be able to accumulate cash to purchase more properties quickly.

Try the Halsey street area , it's starting to accumulate the hipster restaurants and venues that drive people to an area.