Needing a surfshed for long boards on Costa Rica beach house

[Rob Pattison]

I bought a house within 60 seconds walk to a surfing beach in Esterillos Oeste, about 20 miles south of Jaco, Costa Rica.

I've rehabbed the house with the goal of renting it via Airbnb through my property manager, who is an airbnb superhost.

My challenge at the moment is putting in a surf shed on the property to house long boards, tools, a lawnmower, etc.   Because I'm inside the maritime zone (within 200 yards of the high-tide line), my property is a concession (a 20 year lease) and there are further restrictions on what I can do, including a 3 meter setback from the fence.

I've been to the city planner, plead my case, and have been told verbally and in writing, that I cannot build closer than 3 meters to the property line fence, even a shed which would only be inhabited by surfboards, no windows, electricity or water.

So my fall-back plan is to find a portable shed large enough to house 10 foot long boards and some tools.   I haven't found any such store in Jaco, and a google search has turned up nothing.

Does anyone have advice on where to find/buy a pre-built surf shed that I can have trucked to my property?