2016 Cunard QM2 World Cruise

I know this is way early! I am trying to plan a world cruise on the QM2 with my husband. He is still working and we are both self employed. We will be done with tuition in May 2015.

I am thinking about a Princess Grill room. We were on the QM2 in December/Jan 2014 and were in the QG.

Any suggestions, information would be appreciated.

My questions: How much should we budget for shore excursions? Do the sea days get boring? How do you fit everything in the cabin after 3 months, i.e. souvenirs?

Are services such as laundry/dry cleaning any cheaper on a world cruise than they would be on a shorter cruise?

When do the schedules come out for 2016?

Thanks

Barbara