I am retired and travel several times a year...Galapagos is of interest to me but over the years I have had ROOM MATES FROM HELL and frankly there isn't a cheap enough deal for me to risk that. With so many companies doing the Galapagos and having multiple boats I don't know why they don't see the wisdom in "Train Size" single cabins where what is yours...stays yours...what is clean...stays clean and your not paying big bucks to be some other guys maid. Marketing is all about supply and demand and if you do your homework there is a real demand for single (get out of my suitcase) travel. I have spent nights in the loby of hotels escaping a dreaded room-mate and won't take the chance again. I can't financially afford it nor mentally put up with it.
The idea your going to hit it off and be best buddies is one in a million. Design your tours for the clients needs...not what works best for you. You'll be sold out all the time.