I am looking for an assistant property management position to gain experience and build a resume.

Since you're selling 8 SFRs, this could break up into multiple distinct exchanges (most likely), but you have the option of combining multiple sales into single exchange purchases. 

I do think remaining debt free (aside from a mortgage) is the best option. 

The self serve option is hit or miss, I wouldn't use it in a city with strong squatters rights.

Do I have any other options?

That would be a positive for me right now with all the scamming going on.

I’m in the process of learning about crowdfunding as a real estate investment option - to invest my money - for returns.What is your favorite real estate investment crowdfunding platform?

With interest rates at a steady increase, typically investors in Multi units are looking at 8-11% interest on conventional, commercial, and PML options.

I will definitely look into my options with those.

Either option would cash flow around $300/m.