I'd strongly recommend an Accufloat floating course for a permanent or semi permanent application. Extremely heavy duty. Coated stainless steel mainline, all PVC is heavy sched 40, heavy duty connectors, etc. These are not nearly as easy to install as other floating courses but that's due to heavy duty components. Those also help them stay super straight. Much easier compared to dealing with individual anchors etc, and can be of course removed if needed. I picked up one 5-6 years ago for only $300, quickly learned it was a bear to work with if planning in and out a lot as I was. Sold it and replaced with much easier poly line and 2" PVC with spring clips etc. Easy in and out even by myself using a pontoon. Your type of application will have a lot to do with options and costs. Yes a magic submersible course that appears with the touch of a button would be wonderful, but every design I've seen has a lot of moving parts and things that can go wrong and gives me maintenance nightmares. Will be curious what path you take.