To simplify one could just install something like a TwinVee catamaran tender in a simple cradle and have regular davits to haul it up and down. They come with all kind of options and bimini's to choose from. Of course the standard comes already well equiped but may almost double the weight of the original Hil40 itself. I have not found one with a full cabin roof à la Hil40 to make the combination more equivalent to what the Hil40 offers.