Hi, keeping the boat on a fixed mooring or at a dock is Christmastime for marine growth. Typically, you could keep it there for years without hauling it providing you get a local diver with a good supply of scouring pads to dive on the hull once each year. It's a small hull and would cost very little....and you could have a drink or two during the process.
Alternatively, you could keep your eye out for a second hand tank and regulator and spend an hour doing it yourself every season for no more than the cost of a tank recharge. Using Coppercote and products of a similar style is a good idea but you will still need to have someone go down with some wet and dry emery paper periodically to bring out the copper to keep it working. That will take almost as long as the diver cleaning routine...and applying Coppercote is a demanding and expensive process when you factor in all that is required, including the cost of hardstanding.
The FabDock bags are a fair compromise, but, unless they are carefully looked after they can develop a stink, and unless the bag is in absolutely solid contact with all parts of the hull, growth will still occur. I believe that after a few seasons, your neighbours might not be very happy with you.
The last alternative is to buy a good long handled brush to keep the waterline free of weed. It can be done while you are standing on the deck and, as long as you keep the top 6" clean, the beards growing below may not be such a bad thing to remove when you eventually decide to go sailing.
In essence, nothing deteriorates a boat so quickly as leaving it sit on a mooring for years at a time. No matter how rarely they are used they continue to require a lot of maintenance and having a thorough maintenance schedule, and following it, is the only way to keep the boat's value from hitting the toilet.
If you are going to keep the boat there for 10 years, you need to haul it soon, clean it, check it for osmosis, fix that if necessary, then apply a barrier coat and antifouling and than put into place the aforementioned schedule of regular maintenance.
Best of luck!
"if at first you don't succeed....Redefine success"!