hydramaster maxx470
Not knowing what your budget is you could try checking out some distributor sites.
Jondon has a couple listed for sale in their used truckmounts section. I don't know how they are to deal with when it comes to used truckmounts whether they sell trade-ins outright or on consignment for cleaners, or both.
Here's one listed, just the machine
http://www.jondon.com/used/detail.php?siteid=680
There are a couple others mounted in vans.
If and when I get the money, I'll be looking at either a Steam Way Powermatic Legacy 2100 or maybe go for the HM Maxx 470. 3-4 cleaners in my area use
hydramaster machines. I like having the option of dual wand cleaning, Powermatics are only single wand and can be temper mental from what I've been told. I've had some issues with my old Powermatic that came with my business. I'm hoping my mechanic can take care of those issues.
Seems like a lot of guys on the board use
Hydramaster machines... that's got to tell you something.
Good luck