Lightburn doesn’t take much computer resources. Find out what’s good for your CAD program and Lightburn will be golden.
Rule of thumb; take the CAD “minimum system requirements”, increase the CPU to the next-higher level of processor (I3-> I5, I5->I7, etc.) and double the RAM.
Go beyond that, if you aren’t using the machine for anything else, and you are just throwing money away.
DraftSight doesn’t look like it needs a heavy-duty system, either: https://help.solidworks.com/2020/English/DraftSight/corporate/system_requirements.htm
Why do you need a new laptop “pronto!”? Is something not working as well as you wish? If the laptop came with 32GB RAM and 2TB out of the box, it probably has a pretty beefy CPU as well. Maybe you are chasing the wrong problem.