How hard would it be? Theres not many parts to them. 1. Engine 2. Pump 3. cart/skid etc 4. hose/guns/nozzles 5. fuel tank 6. maybe hose reel built on anything else? I know you can pickup new fancy vertical engines fairly in-expensively compared to those being sold "built" on a pressure washer already. I figured $1k - $1300 can get a 15-20hp 2cyl Vangaurd engine $500 high end pump $200 cart, not a cheapo one Already have guns, hose, fittings etc for other smaller pressure washing machines we all upgraded its hardware already. $50 at most for some fuel tank Hose reel $50 A little over 2k and you can put something like this together... I see briggs and stratton has a 19hp vangard model pressure washer online, but as far as i can tell, its almost 3k, no hose reel, nothing fancy, just a cart, 19hp 2cyl motor and a cat pump?