I have cleaned my pits for over 20 years,on my 2nd ring-matic 750. I pump in the evening when wash has slowed down. I paid off first pumper in 2 1/2 years pumping my 3 washes and hiring out too. I didn't pump sewage tanks.
I've been digging them, but my back can't handle it anymore. I'm dealing with four washes now, we just priced out having them pumped and they want $6000 twice a year. Time to buy a Ring-o-matic clamshell cleaner...
I used a ringomatic for 25 years and did all the pumping myself for the first 15 years. Then I mostly let my employees do it for 10 years. Now I use a tractor with a custom made pit
shovel and I do the pit cleaning about 1/2 the time as this makes cleaning the pits like sitting on a easy chair. Gator from this forum made the first one.