Hi, welcome to the forum.
You are allowed to use HFS commercially, but it's strongly not recommended. HFS was designed for home use (with lightweight usage), to share files between friends and family. Anyway, you can use HFS in your business, but at your own risk (the worst that can happen, is that HFS could crash and stop responding). It's recommended to use the latest 'stable' version
2.3m along with
Throwback14v6 template. If you want, you could give a try it for a few days and then commenting here if it worked fine or not (to keep this as future reference for other users).
Cheers,
Leo.-
PS: Please edit the title to 'Using HFS file server commercially', since using capital letters mean shouting on internet.
And you double-posted this same message
here (you can remove that too).