A note on Industrial Machines that I think needs repeating here.

If you are only going to do 5 or 6 Kilts for yourself don't go through the expense of an Industrial Machine.

These things are heavy duty, run all day long, day after day, month after month workhorses.

Most of them are pretty specialized. They are designed to do one job really well but are not always adaptable to do everything.

They also cost a pretty penny. My 5 Pfaff 138-6 zigzag machines cost $2000.00 each and then another $450.00 each for electronic motors instead of the older friction clutch ones.

If I had to buy all new machines today I'd go with Juki's. But that is because they no longer make the 138's.

But that is perhaps a good thing for a home industrial because many Pfaff 138's can be found second hand for very reasonable prices.
If you do canvas for tents, or boat covers in addition to Kilts then a good used Industrial could be a good investment.

I would never tell someone to buy a used sewing machine sight unseen though. Never, ever spend that much money without having a sewing machine tech take a look at it.

Most good sized towns have a sewing machine shop. Go in and talk to the technician there. Bypass the sales person and go direct to the person who fixes the machines in the back. Take a sample of the fabric you plan to use and perhaps a sample of the type of Kilt you are planning to make. Ask the tech to suggest a machine that will handle the job.

Then don't buy anything better, newer, or fancier than the one they suggest.

If they don't have a good machine in the shop tell them to look for one for you. Most shops repair all the machines in their area and will know everyone who sews and has machines.

Your local sewing machine repair shop (Independant, not a chain that just sells machines to quilters) is your best and smartest resource. Use them.