I bought an industrial Singer needle feed to use for leather and luggage, and it served me well. I paid around $600 for it over 10 years ago, and changed to a leather needle when it was time to sew leather. Dang, it hemmed jeans nicely, too. A simple vintage machine like this doesn't even have a reverse: you've got to lift the presser foot and pull the stuff back to lock those stitches.
Since then I've purchased two walking foot machines, both Jukis. Now keep in mind, not every "industrial" machine is a heavy duty, leather-demolishing monster. There are
sewing machines with drop feed or needle feed that are more suitable for shirt construction, for example. And of course you can get heavy duty monsters with walking feet, compound feet and bizarre gears that pull stuff like sail boat sails through.
What makes a machine "industrial"? Well, some use 220 power, so you can't just drag it home and plug it in. Industrial machines are made with heavy metal components and external motors, and both elements are made to operate for hours and hours and hours. Other common characteristics of industrial machines is specialization: machines are frequently made (and then customized) to do specific jobs, which makes manufacturing really fast. There are something like 15 different machines used to make a pair of jeans, which is why it takes like 18 minutes total to make them. Someone is there just making belt loops, and someone is using this weird thing that spools waist band material off of a spool and this weird machine sews it onto the jeans like bam, bam, bam!
So- just running out to buy an "industrial" is not necessarily the solution. These things are specialized; you need to get something intended for upholstery sort of work. Machines with double clutch are less likely to have catastrophic breakdowns; expect to pay more to buy such equipment.