With respect, I don’t think Truck amounts are overpriced at all. Do they cost a lot of money in comparison to a portable, you bet, but hell, they practically print money. They produce a much higher standard of cleaning and are hugely more productive and efficient and they are a marketing tool in there own right. Anyone of those points is worth the purchase price in the first year alone.
I know a guy that has 8,000 hours on a Titan 575 and the machine earns at least £100 per running hour, work that one out.