Master clean will do you a package For £1600.00 500psi, heat, wand, hand tool, vac and solution hose and twin 3 stage vacs. This is what vernon quoted me recently (inc v.a.t). Keep your small machine for spotting etc. Then your up and running, top spec machine to handle commercial, domestic and a back up.
Everyone has an opinion and some one is bound to bring up that you should be spending x on x machine. But you will have to form your own opinion and go for the machine that you feel suits your requirements and needs but bare in mind as you grow your business your needs and requirements will change.
John