I know a lot of people say this, but I do feel like this is an attainable goal for me because I’m 21 and the only debt I have only 5k in student loans, and I owe 4K on a vehicle.

I'd find a local landlord friendly LO and give them a call, you didn't give enough information to offer precise advice, and you will need that local connection anyways, so may as well get started on that now.

The next economic boom will likely follow with 5G, AI, and autonomous vehicles.

I want to start by saying that turnkey can actually be an excellent vehicle for the investor that doesn't have much time on their hands to take on a big project.

The question becomes what is your return on the equity tied up in the property versus what it could return if it was liquidated and put the work in another investment vehicle. 

I would consult with a CPA first in terms of how to set up your business for the best tax vehicles and $ movement and start aligning yourself with professionals who are familiar with this investing space in your local market.

It has all the usual questions about name, address, vehicle, SSN, etc. but it's rare that i get one back (I email them).

What are the vehicles she's using to invest now?

This is for 'person may be occupying a recreational vehicle on our property and this is violation of municipal code (someone living in an RV for more than 72 hrs). 

.), broken down into subcategories, you can maybe see that exterior renovations generally cost more than kitchen/bathrooms etc for the majority of properties in that area...Then you could start to come to more educated conclusions of maybe what material to use for a deck foundation because it turns out the extreme humidity wears out certain materials faster than others, and who you should hire to do the work based on a calculated average of cost vs. positive reviews for each contractor..This is a pretty simple and limited example, but I guess my point here is that data and ML will absolutely help you identify certain trends with more precise accuracy, however it still requires a thinking brain to figure out why that trend exists, what direction that trend is going to go, and execute a plan based around your newfound insights.