Even though I said "we" I was actually considering it for a solo trip I may pop soon. I travel A LOT and sometimes I just want to get someplace and don't need the extras. I don't have a need to make stops anymore, I just want to get where I am going. I have done the exact math you displayed and that is why we take a private driver, $60 plus a tipseems to be the going rate at least for anyone I have talked to, but for one person it seems like a bit of wasted $$$.
Depending on where you are staying, it can be a good number of stops letting off tourists before you get where you are going. Six on the last time I went to the airport from Negril on the bus.
Peace and Guidance
Free Opinions Offered. No tipping required. Hours: Open when I feel like it.