Last winter I was quoted $1500 for shrinking. Ended up building one with electrical conduit and HD white tarps. 20x30 over the bow and wrapped around the mast, 20x40 over the (supported) boom/bimini structure. meeting edges were rolled and stiched with 4in cable ties and reinforced with Tyvec tape. Foam pipe insulation was used over all hard points and along the bottom of the tarp to keep the grommets away. Blue plastic tarp repair grommets were found to be very useful as they do not pull out. The Tyvec tape was the only thing that stayed stuck below -20C. My one regret was not enough pitch and had to clear off the snow a few times. Both tarps and all seams survived the winter, was well ventilated and cost about $400.
New location has me shrink wrapped at $850 disposal/recycling incl. and no maintenance, easy choice.