Your Thingiverse only has two over year old designs? How serious are you?
Yea, I am net positive with my 3d printing, that includes buying another printer. You have to remember that the raw material the 3d printers use is relatively cheap. I can print off something that costs me less than $1 per part, not including labor, electricity, etc, and still charge multiple times what it cost me to make. #d printing is basically a money making machine if you find the right niche and are decent at design.
Wow, I'm 36 with recently diagnosed ADHD, and I'm really interested in all the posts here. I've been using Vyvanse for the last month. While I Love that it's suppressing my appetite, I don't feel like it's doing very much for my ADHD.