I have the 2019 model of the OT 120 PDL. It is a nice and stable platform but yeah it's heavy loaded. I usually make two trips from the car to the water, if it is a beach launch. Once with the kayak and the second for the PDL drive. I use the CTUG with the sand wheel. The think the beach wheel would make it easier to navigate the sand.
I have put a Bixpy motor on it and it is great on the water. I still have it in addition to my Solo Skiff.
Sorry it didn't work out for you. Good luck with your sale.
A video compilation of 2020 fishing on the OT 120 PDL.