I bought a Shapeoko Desktop CNC system with an off-the-shelf common router and it took me quite a while to get all of the bells and whistles of the software kinks ironed out in my mind. Once you understand the software and manage to make a design the rest of the process is a piece of cake.
I then sold that smaller model and purchased the next size up and never looked back, but, if you don't pay attention you can still make mistakes.
I was doing some Xmas ornaments on one board about 3 weeks ago. I got the thickness of the board correct, but I had not paid special attention to the required width. The ornaments looked like they were O.K. but did not mill correctly. I then used the only board of the correct width that I had, but instead of 1/2" thickness it was 3/4" thick. I milled the ornaments any thinking I could easily shave off the bottom of the board with the band saw. That actually worked like a charm.
I took those in to our normal monthly CNC meeting for a 'show-n-tell' and the guys liked those. When our meeting was over I took them next door where several ladies meet and told them they could each choose one ornament as their own and paint it and hang it on their tree. They were thrilled with that. They were also very curious about WHAT our meetings were about so it was a good way to show them as well.
I bought my CNC systems for ENJOYMENT more than just having to produce items on an assembly line basis. My system sits idle - a LOT! But when I get the urge to do a job I look up an already completed design or build a new one and then produce the finished item. I get a HUMONGOUS AMOUNT of pleasure at completing a job.
And YES you can do production line work. A cousin teaches a 3rd grade
class locally and I did 23 small boards on 1/4" plywood for her students to color a design as something for them to do during the last gasps of the Covid19 garbage! They all liked the
project too!
SO, is it worth it to buy one? From my view - being retired - yeh it is worth it. IF you are looking at Production Runs you
should have some
experience on some other CNC system first and then buy a really good system - and then make sign your contracts. SO, can you produce
enough interest to keep the contracts coming in? How much would it cost you to just have that expensive system sitting idle for 2 to 3 to 4 weeks waiting on the next contract? I would say just off hand that you would have to be really experienced to have lots of contracts coming in. It is more likely that you would wind up more of a hobbyist rather than a production shop.