I am a USMC veteran so I have some flexibility with finance options and I am looking to utilize all resources I can to build and scale my portfolio.

I'm interested in purchasing raw land (or close to raw) to scale up as cash flow permits.

But no one that stupid is going to ever get to the point where they are entertaining a 100-unit, so there's no point in trying to market to that person, they don't really exist at that scale (and, to they extent that they do, they aren't falling for real estate scams, they are falling for crypto/nft/blockchain/ai [+ next years buzzword, whatever that is] type scams). 

As your business grows, HubSpot scales with you with paid plans offering more advanced features.

A 4-unit property is a great way to start and scale fast. 

I agree I can make more per unit with SFR but scaling is tough.

Most of the landlords here who are successful, quickly buy 10+ for more economies of scale, have good handymen on staff, and have eviction lawyers / attorneys ready to go.

Typically, management groups of this scale are VERY efficient and are maximizing revenue and NOI on a daily basis.  

I've been real estate investing for about 4 years and have scaled to 9 doors across Memphis and Detroit. 

I find that you can get private lenders or Joint Ventures easily and scale using those connections