Couldn't find any cost estimate, but from https://openquantumdesign.org/the-quantum-computer (scroll down to "What's Inside") I'm guessing 100's of k$ for the bill of materials (let alone keeping the thing going.)

So the "you" in "your own" has to have pretty deep pockets...for a relatively low fidelity 30 qubit device.

> So the "you" in "your own" has to have pretty deep pockets...for a relatively low fidelity 30 qubit device.

Sure but once you buy it, all the "you"s in all the other universes get to have one too.

Most of the cost is in overpriced laser systems; if that gets solved a trapped-ion system could be reproduced for few tens of thousands of USDs. Still not a hobby weekend project, but certainly more attainable for more universities.

Okay so not a weekend project.