You can build a scalable business that can accomplish either. 

If everything goes well and you do end up with $100/mo cash flow, I don't think it will be scalable if you plan to grow in a similar manner as your DTI/DSCR will likely become an issue. 

However, I see you're a new realtor and it may be important to realize that your career allows for scalable income.

You should think about what's scalable in your business.

Your #3  starts to speak toward systems and scalability, which is the goal of many investors.         

It's scalable by price/units to cover your needs.

I'm just in a pickle whenever I use my own funds into a deal as I have to wait until I cash out refinance which in theory, delays portfolio scalability.

No $ left in it, equity capture, repeatable and scalable provided you don't hit your number of loans limit.

This business generates $1-2k of cash flow per month before taxes; it will grow a little but is not very scalable.

For example, I need advice with financing of future purchases, I especially like small to medium apartment buildings, how to access the equity in my current properties for future purchases, establishing the proper holding entities, approaches to reducing costs and systems that I should have in place to allow for scalability as our business grows.