Yo, look at this cool vid from the UFO guys getting a lot of bang for buck on the most cost effective foiler on the market.
Just by way of comparison, lead is heavy and expensive. You need to lug big sails around to get it moving which requires constant crew to sustain the manpower to move all the lead. Foils lift while lead falls. Foils are the anti lead. Just look at the fun per pound, per unit of crew or fun per burden.