You are doing the right thing to build relationships first! 

We've been continuously improving it, but it has been working exceptionally well for us since we hired a developer for the complete build-out a year ago.

What factors should I consider when making this decision?

@Craig Holland Land is often sold with owner financing, in part because buyers have a hard time financing it, and in part because buyers often only need a short time before they can build on the land and refinance out of the seller loan. 

One thing that I’m seeing it that large multi unit buildings beyond the 800k mark are all on a boiler and paying to heat the entire building ruins the numbers.

Success in this business comes down to consistency and building strong relationships.Let me know if you'd like to further connect - I'm happy to provide any guidance. 

I view real estate investing as another wealth building tool in my tool kit.

If you want to build out a portfolio of multi-family rentals that cash flow to the point of not having a W2, that's one thing. 

Usually the type of work has to be dealing with the real estate itself, not just providing a service that is applied to a part of the house/building. 

I've had pretty good success the last couple years with a combination of house hacking and building Accessory Dwelling Units.