Laser engrevers without usb connection

The cheapest and easiest solution, in my opinion, would be to find an old PC or laptop, install Ubuntu and let it permanently control your laser. You can transfer the files either via USB or LAN from the “construction” to the “work” computer.
I have saved some PCs that have been retired due to age, no kids want those slow boxes, but LightBurn runs great on the machines.

But to answer questions, any laser that can work from a memory medium or dsp controlled laser that runs the whole project after it is send complete will be able to be used.