You can build your own ultrasonic cleaner and stay within $550...600 easy.
I found ultrasonic bath with non-working heater for $150 with 120W transducers(4x40w), built my own frame to hold puleys and rotating pole, utlized unused electric corded drill by drilling an extra hole on the trigger to get slow rotations and mounted it to the frame with pooleys.
I was able to get the rotation speed of 2rpm. I also attached an acquarium filter purchased used on CL in great condition.
The total cost went way bellow VPI HW16.5.
Some of the extreamly valuable records I place on VPI after ultrasonic cycle is complete. I use timer on ultrasonic bath that signals the end of process.
My custom made unit is able to clean upto 8 records.