I've never heard a cabinet guy say it's cheap to set up shop. I've heard of people renting shop time or renting the tools if they are starting out.
I had been looking at building a small garage to start off, but I don't wont to fight my local government on have a business at the house.
Hey CJ, Lord knows you been trying to get something going.
A cabinet shop is going to need one heck of a cash outlay to get started.
Then several months expenses in the bank to cover you during start up.
Besides stationary equipment you will need fab tables, saw blades, cutters, bits etc etc etc....
$300 for any kind of commercial space is pretty low.
Cabinets are also very competitive.
Not to burst your bubble, but why don't you start with a Handyman gig.
You have most everything to get that going. Keep your job with the city and do Handyman stuff after work & weekends.