Doing it yourself (even if you could do it online) is not effective or scalable. 

They are looking to make investments into start up businesses that are highly scalable and offer the opportunity to 10x, 30x, or 100x their investment, knowing that any particular investment they make has low odds of doing that (and will likely fail completely)Angel Investors normally have lots of money, and perhaps for a different piece of their investment strategy would make higher risk loans.

I'd rather just work for myself and invest my own money even though I know it's not as profitable or scalable.

The other path, which was the one I ultimately chose, was to start a career which would give me increased exposure to the real estate industry as well as providing the opportunity for scalable income.

There is no "seasoning" period, which has the potential to slow your scalability down considerably.

My goal is to build sustainable and scalable wealth.

There was nothing too scalable about that, just got very lucky.

By just buying low end of comps and doing a light value add + raising rents you are creating forced appreciation on a milder level but it works and is scalable when you want to do a second house hack in a year repeat.VA loans can be an awesome tool for zero down but be sure to note they are strict on inspection and if this property needs work and owner won't make repairs it will not pass underwriter.

My Model is not scalable until I stop self performing and start using subs Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?

It's just so easy to make money and infinitely scalable.