Building an abrasive waterjet cutter with a $150 pressure washer.
Water orifice, mixing tube (nozzle), cutting head, high pressure fittings, valve: https://www.accustream.com/
80 grit garnet abrasive – ebay
eg https://www.ebay.com/itm/40-LBS-Garnet-80-grit-coarse-med-sand-blasting-abrasive-Fast-Cutting-Media-/272599344178
Sun Joe pressure washer: https://www.amazon.com/Joe-SPX3000-Pressure-14-5-Amp-Electric/dp/B00CPGMUXW
Pressure gauge – https://www.mcmaster.com/#4053K15
Good waterjet background and design info: https://wardjet.com/waterjet/university/nozzle-orifice
Good selection of higher-end pressure washers: https://www.pressurewashersdirect.com/
Wikipedia waterjet cutter (diagram image source): https://en.wikipedia.org/wiki/Water_jet_cutter
Wazer waterjet cutter on Kickstarter: https://www.kickstarter.com/projects/1294137530/the-first-desktop-waterjet-cutter
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