Continuous lateral rotation mattresses are pretty different than changing sides with one push; the steps between positions are much incrementally smaller.
Besides being really expensive, there is no evidence overall that they are superior to other pressure relief surfaces (which can be as low-tech as foam with the right powered bed frame). And most PALS aren't at high pressure injury risk just by being in bed at night. For PALS who are in bed 24/7, of course, the situation would be different, but most aren't, for long lengths of time.
Powered rotation can also be intrusive and disturbing as muscles weaken, atrophy ensues, balance/center of gravity changes and joints weaken. Think of being out in the ocean and continually being buffeted by small waves. All night.
For keeping a PALS comfortable at night, I would look to another solution first, and we have mentioned several. The bottom line is that "hard and soft support" like foam shapes, pillows, bed angles, etc. positioning can be customized and changed as you progress, and updated during the night if/as needed, but a powered mattress doesn't permit that level of fine-tuning.
As for optimizing circulation and reducing pressure ulcer risk, circulation is improved with passive/active range of motion exercises and massage. Moisture management and hygiene also go a long way toward reducing pressure ulcer risk.
I am not saying the CLRT beds don't benefit anyone, but I wouldn't spend a lot of time and money trying to get one as a first-line bed.