I just watched a youtube video where they built a power drill tool for digging holes for seeds that worked great but would be highly impractical to manufacture from a commercial perspective but was interesting from and engineering perspective and got me wondering is there anything like that that would interest me.
I have something like that tool, it's a dirt auger that goes in a drill. The drill needs a side handle to not hurt wrists though.<p>I'd probably buy a bunch of portable x ray fluorescence and mass spectrometry gear, give them to all interested friends, and try to make civilian toxin hunting as a hobby be a thing.<p>I might get a high end PC and do DeepFakes vtubing.
Maybe I'd set everything up to be solar offgrid and work on making
My whole town mesh network-ified.<p>Most of the stuff I'd have mentioned is now cheap consumer gear. I've already got a 3D printer and FreeCAD, I've got IoT sensors, cheaper phones are fine, I'm more into tabletop and only very casually interested in video games.
I would buy a $100B datacenter (hire some datacenter architects to make it) and train a big brain AI. Expense also includes siting and electricity and other operational costs.
I've always wanted room-scale anechoic chamber technology to be a thing. It would be cool if some high-tech wallpaper or in-wall speaker could cancel out external noise and give your bedroom or studio apartment peace and quiet.