There is a guy who keeps his boat at Ralphs Fishing Station in Mt.Sinai harbor who has a lift that fits in his slip and lifts his boat out of the water when he is not using it. Boat is about 25 ft. You might call over to Ralphs and see if they can tell you more.
Rig a fore & Aft Cradle strap between the two docks wieghted down in the middle so it sinks and connected to two hand winchs. Then just crank it up out of the water. Take two people singing old slave songs to syncopate the ordeal so the boat does not slide off. Cadance Dude.
When in the water it only wieghs 1/3rd of 1,900Lbs
so it should be easy enough to lift with two 1,000 lb winchs.
That should cost about $100 bucks at Wal Mart. and make your insurance brokers smile.