Hello Andy. Welcome to this community of land investors. Sure it works. You get out of it what you put into it. Some people are satisfied with doing one deal a month. You can grow to much larger volumes if you give it the effort.
Since there are fixed and recurring costs each month for data sources and other tools that make this possible, I would not call it a hobby. You will have to figure out how much to spend on tools of the trade each month. Good luck.