I don't know what the cost is, but an alternative way to combine a boat ride with a ropeway ride would be Nokogiriyama.

I've not been and don't know how much it costs to get there by ferry. So I've no idea if this is a cheaper option than getting the Hakone Free Pass. The Buddha at Nokogiri yama does look extremely impressive, I'm sure it would make a wonderful day trip.

I'd be glad for the information if anyone has it (or can read it) as it's an outing I'd like to go on myself one day (hopefully soon).