If planning trips is keeping you occupied right now, then I say plan 3 or 4! Looks like you're right on track for boredom to set in. During my 3rd week I was sooooooooo bored. Done with TV, but still not sharp enough for my usual interests.
Cruises can be amazing vacations, even with a bad leg. I couldn't walk much when we went for ours about a year ago, but I still managed to have fun. Some ships will allow you to bring an ECV that fits in your room to help you get around on the ship and for excursions. I didn't have one, but even with trouble walking around, I'd park myself in a lounge with comfortable seating and a good window and it was still a lovely break.
I've been spending a lot of time looking into future travel too. It's a good way to remember that recovery is temporary, even if it feels like forever some days. It will all be worth it when we can get around and do the things we had to put off.