I was thinking "cheap guy" solution:

Install masthead hook like smaller beach cats

Install snap shackle to main. Run emergency release line attached to shackle down mast.

Tie red "Emergency Pull" handle to release line. Sail will come down.

Probably not good for reefing, but maybe add a second shackle on a short strap (3') to lower main to reef point? Don't know how you'd hook both shackles to the masthead hook, but ....