Hot water is the way to go.
Water as a natural solvent works even better as such when heated.
It makes cleaning more efficient and faster. Chemicals work better with less and you make money faster because you
produce better results in shorter time.
4000psi, 5+ GPM belt driven pump but heated!
Trust me. Cleaning houses is even quicker with hot water vs cold.
I bit the bullet back in 2002 and never looked back. Still have the same machine and it has paid for itself many times over.
Rod