That is something which could even become scalable (ie. 4 hour workweek) and which could still allow me to invest time and money into RE.

Also note that for accredited investors its just not scalable.

Most of my mail campaigns have been blind offers in recent years (because it makes a lot of sense when you have a bigger marketing budget and less time to interact with leads, it's a lot more scalable in that respect) and my course has a lot of videos, templates, tutorials, and even interviews with other land investors on different ways to implement that approach.Outside of the basic software and services I recommend (you don't have to follow my recommendations at all - I just point you to the things I've had a good experience with), there is nothing else you have to pay for outside of the course. 

Also, would you say your method is scalable and cost-efficient?

The business is not scalable as a result.  

Also most of the good designers are very small businesses so they are busy (because they are good) and their business is not scalable so you have to wait a while. 

This is due to a myriad of factors — namely the tax benefits (massive), the scalability, the certainty/relatively low risk profile, the ability to create a passive portfolio and, arguably the most important factor, leverage; This single input allows you to accumulate wealth at a relatively faster rate than with any other investment with considerable less risk (Think Cash on Cash).

Has anyone been in this position or have any recommendations if I should focus on my career and increase income while doing that, or potentially getting a scalable side hustle.

I'm in Self Storage but still have the same financing decisions as it relates to Scalability/growth.A. 

Do you think Zillow rental manager is scalable?