Prochem are the backbone of our industry. Well built machines, good back-up and support, good chemicals and good training. Possibly the industry's best "one stop shop to buy it all".
Yes, there are plenty of other alternatives which will be revealed by using the search facility on Clean It Up.
A good place to start for Prochem is with this forum's sponsor, Express Cleaning Supplies (see top of page). Prochem sometimes also have an offer of a free training course if you buy one of their machines. IMO, this is more valuable than the machine itself

Safe and happy cleaning

The Ken