Hey ive been following your question on a few forums and unfortunately there isnt a cheap way to recover directly from the surface cleaner. The amount of vacuum required to use it effectively isnt going to be found at home depot. If I were you I would get a $120 shop vac with auto pump out and 4-5sand tubes and start with that. You can still use that surface cleaner (plug the vac port) then you just rinse after, taking care to direct your water to your collection area (using sand tubes and a guy on a squeegee). At your collection point have your shop vac with a puddle sucker picking up the wash water, then you can direct it where ever you want (tank on a trailer, landscape, etc.)
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