Perform a simultaneous exchange where the sale and purchase are both scheduled and occur within a day or two of each other.The easiest way for foreign nationals to get away from the FIRPTA requirements is to purchase and hold property in domestic LLCs. 

I'm looking to shift my focus from the long game of rental appreciation to the BRRR method.

Use the enemy method to see what other properties in the market are doing. 

Others specialize in buying rentals using traditional 20% down methods. 

Instead of going through banks or credit unions, this method involves borrowing money from private individuals or organizations.A major benefit of private money lending is the flexibility it provides in terms of loan conditions, interest rates, and repayment schedules.

New to real estate investing so any help/recommendations means more than you know :) Does anyone know what would be the easiest or most efficient way to go about getting a new quadplex built in the Greater Atlanta/surrounding area?

House hacking your primary home and repeating the process every year or two is the easiest and safest way to build long term wealth through time. 

Buyer agency was the easiest entry point for new agents, and easiest of all "leads" to get.

Use the wholesale method of buying in a down market to amplify results.  

The easiest way is to bring on a partner who has a lof of capital they are looking to deploy, but I always encourage having sufficient reserves.