When we bought our Rave trampoline we had Sports and Marine Parafunalia install it the first time. Since then we have taken it out and put it back in our selves. Not overly complex. Just follow the steps in the instruction manual in order. In recent years having a teenaged granddaughter willing to swim it out in the Spring and back in the Fall has made it much easier
You do have to go under the trampoline to connect and disconnect it from the mooring line. We have a 500 pound concrete block. If you do not already have a mooring block, then you will need to have someone help. Suggest you contact Sports and Marine and ask for names
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https://www.parafunalia.com/water-trampolines.html