I remember the parents having one of those countertop water facet types in the late 60's or early 70's.

Basically all they were was a box to stand the dishes on a rack, a spinning bar below spraying water upwards at the dishes. Maybe one on top spraying down too, don't remember that for sure. Connect to sink turn on water, pressure of water spraying from the rods was what turned them. Might have been the ends of the rods were bent back so the water comming out drives them forward like a wheel, water jets spraying up.
 They spray at an angle towards the dishes, water presure drives them so if you have high presure and use it they go fast, low presure they go slow.

Maybe some copper tubbing, old presure washer (if wanted), case, and a rack to hold the dishes ($1-$3) and you could build something.

I think the only 2 real tricks would be keeping the case water tight and a spinning rod that does not leak to bad at the bearing for the water supply. Next time I see one at the recyclers I will pick it up and try building this myself. Maybe $3-$5 for the whole thing with all the parts needed to build my own larger unit like this.

I can think of alot of ways to build one, should work and look nice, and be cheap to build and use. Could filter the water and repump it durring the wash cycle to remove the gunk, then drain it and use fresh water for rinse and just let that run out washing the washer out too instead of re-pumping it. Clean the filter like a lint filter for a dryer, or use a fine stainless filter and have spares, toss em in the washer when you do the next load.

Getting into these basic washers it's still kinda manaul, you load and manauly change cycles. But at least you don't have to stand there forever washing one at a time.

 Oh ya, for soap, just make a bottle in the line like the presure washers have to mix it and water, or if using a sump and repumping the wash water toss it in there.

This would be the most effecient probably in terms of water and electric use. Especailly if you repumped it durring wash, leave it run as long as wanted.

 I used to recycle the clothes washers rinse water myself beore I had a well and had to haul water. Will be doing that next year (after winter) again too.
Dump wash water as normal, save rinse water in barrel, use rinse water as wash water next load. It works well, saves water, and uses less electric to pump water from barrel with a hose and small pump than to use the deep wells 220 pump. Just dump the last rinse water of the day, and save the first the next day. Fresh it's fine, does get yucky if you let it sit a few days though. Over night may be ok? Not a week though!!

 
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nothing to lose