But unless you're actually interested in the work a Realtor does and are willing to dedicate a lot of time and energy into creating a sustainable business, I would not bother to get licensed.

The actual fee itself does not matter, what matters is if the fee is enough to sustain the current budget and keep adequate reserves for future CAPEX items.

I want to create cash flow to help sustain me while I’m in school (on top of my post 9/11 GI bill benefits).

That’s $7,000 a year, which is not enough to have the cash flow to sustain you, so you can't quit your day job.

I don't mean to be a negative Nelly or anything, but one thought I had reading the above comments is that it may take time to get enough cash flow to be self-sustaining, so you may want to consider ways to keep your wages as high as possible before then. 

I think you need to target an area, do your hw (LOTS OF HW) and determine if the area is capable of sustaining what you want to do.

Having 6 months worth of savings or a side hustle that can sustain you is super important.

This is the ONLY way that is sustainable. 

We enjoy living here much more than I ever expected - I'd even say I love it here - but at the same time there always seems to be a bit of underlying concern over the growth, when the next recession is going to hit, and sustainability in general.

I had tenants a while back who were just unable to keep up with the rent, and had got gotten themselves into more housing than they could sustain.