Make that two strong bodies and a teenager.
More, if you try to lift it entirely off the ground - the way to handle it with fewer people is to let the floor, sawhorse or trailer support one end or one-side or even one corner of the boat at any time, so you tilt and roll rather than lift.
To raise / lower, build supports as stacks and lift one end, and add/remove a layer from that stack, then do the other end. Not that slow, but saves backs.