get the 15 not the 5, too small and the water will come out of the exhaust very easily. the extractor attaches to the ranger 200/1200psi. the vac motors on mine hp 3 stage 5.7s will last me 2 years when used full time. its not easy to change the vacs as mytee but any handy man will not have any issues at all, it will take probably 10min extra. the waist tank is difficult to clean in the winter outside -20. ditch the mesh baggy filter inside and use an external filter, because the baggy mesh filter gets full very easily and hate to open the waist tank to clean it in the middle of the job, winter time cleaning that inside which i can't even think about that.