Join Date: Mar 2007
Location: New England
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Depends on where you are and where you want to put said mooring. You often just can't put a mooring in wherever you want.
If what I think you mean above is that you are buying the Mooring Tackle (Anchor/Block, chain, float, pennants, etc.), then that is all you are buying, not necessarily the space that the mooring is currently located. Also, no mooring (tackle) will last 10 years, especially if you put a boat on it. Even if you have a concrete block, that will eventually go.
I moor in Salem Harbor (MA) and you can't just put your own mooring in, even if you own the tackle. First you need to apply/get a mooring spot, then the mooring tackle has to be moved to said location by a approved mooring company. When I go to re-apply for my mooring spot each year, I have to show proof that the mooring was serviced by an approved mooring company before I can renew my permit. I pay $225 for service each year, which includes 2X inspection of the block, chains, pennants, and mooring float, and removal/install float/pennants/pick-up buoy each fall/spring. If something needs replacing, I pay for the hardware. The service fee covers the install. Top and bottom chains last about two three years in salt water, the float 5 years and the pennants 1 to 2 seasons.
You may want to ask the local harbormaster of where the mooring is currently what the rules are and also follow up with the local harbormaters/town government of what the regulations are for moorings in your area if you plan to move it. You will also need to get some to move/install it for you if you do plan to move it from it's present location.