I've been with my boyfriend for two years, we don't live together, we are in our 40s. Three months ago he quit his job. He had been unhappy in the job for a while, so that was fair enough. He planned to get another job, but instead had the idea to start a business. The "business" that he settled on is 3D printing. I've mentioned a few times that surely this is more of a side hustle, not something that can replace a full time job, but he just told me that he's "sure it's going to work".
First he made dog models, some were OK, some were really tacky and never would have sold. I tried to tell him this politely but he said some people might disagree (they wouldn't have).
Then he abandoned that idea and came up with a new idea that he's been keeping a secret from me. Last night he finally showed me. It's 3D printed characters that kids can paint, and he plans to sell them for £10+, along with t shirts with kids names on them. There are so many issues with this. You can't sell licensed characters, and there's better, cheaper (official) stuff available at the supermarket. Also kids shouldn't wear shirts advertising their names!
Parents wouldn't buy this. I'm a mum so I would know. He doesn't have kids. I tried to say a few nice things, because I know he wants me to support him and he'll be disappointed if I don't. But I want to tell him it's a shit idea, and he's wasted months on.
Tbh I feel like I've lost respect for him. He cannot possibly be this lacking in intelligence to think this is a great idea. He hasn't done any market research, even on me and I'm a mum and right there. What am I supposed to say? Aibu?