People gawked at the 1k+ price tag of projectors milan was offering, but had no idea what was involved. If half of the people that said they were too much would have tried it themselves they would realize what all is involved.
When I build headlights for people, it ends up being 1k+ also, but more then half of that is built into supplies and parts.
I cant imagine this whole thing would be 'easy' for you to set up, so I dont see 100$ being feasible. You may think it is, but after the 3rd set or so you're going to hate yourself
