Is it worth it? On economic grounds alone, yes. Also tick the yes box for a fulfilling and rewarding hobby.
I dont use a Gene cafe but I dont see too many complaints from GC users. From what Ive noticed on CoffeeSnobs, for faster cooling of the roast, many prefera cooling method other than the GC cooling cycle.
Consider volumes as well. You are limited to 200-250g per roast on the GC. If you have a high demand, you might want to go for something larger capacity like a corretto or a KKTO.
Think also location. If you live in a unit block, a GC or HotTop might be preferable to reduce any nuisance factors.
The best advice I can offer is, if you are considering it, just work out what you want and get into it. It will take some patience - dont expect brilliant results first up (but dont discount it either)