Gas station or self storage. It’s basically a land squat. A chain of coffee shacks would be viable too. Reselling shoes is viable but not good for getting more laborers. A child care or tutoring facility would be a good choice too. But lots of work. Otherwise maybe eth mining would be profitable even on gpu in a year. Ideally you would buy some equipment that’s easy to move and retains value then sell it off after 2 years with minimal losses.