I seem to be moving from new home construction cleaning to development cleaning.I have 2 Pressure Pro 8@3500 PSI units which have been great.But we are getting more into larger square footage jobs.Just completed 120,000 sq.ft. this week.The jobs consist of paver roadways,walks,concrete cart paths,curbs and gutters.I have the contacts to do many more developments but overwhelmed with the time to complete with present set-up.Whats the ultimate big footage machine? I'm thinking 12-14 @ 3500 on 1/2" hose? Am I on the right track?I'd like to know who has similar jobs and what works for them. THanks Guys