Adam Surry
when you have as many options as we do to get to the end result of a clean carpet. lots of methods that are far more productive, you have portables that are 7 times more productive than standard portables, rotary that will not only be more productive but less effort for user.
TMs are designed to work at distance all that power and heat is so you can pump hot water to wand without in getting cold and then return the waste back to the machine.
Productivity equals profit. then you have running costs per hour TMs much higher than other methods. you can pass these cost on to your customer or make charge the same and make more profit.
I would have a look at a mix of methods
Good luck