Hi Marisol,
Welcome to planDisney, and greetings from a fellow Disney planner with a family of seven! As the mama of five Mouseketeers, I understand what it's like trying to make plans for a larger family, and I'd be happy to help you navigate the process for your crew!
Yes, you may certainly
buy your tickets one at a time, and please feel free to
link them to your My Disney Experience account as you go. Just keep in mind that you'll only be able to enter the theme parks if everyone has a valid ticket
and Disney Park Pass reservation. Depending on when you're planning to visit, you'll want to make sure that you have everyone's tickets purchased early enough that you're able to find reservations while there is still
availability.
One tip to help stretch your Disney dollars is to purchase Disney Gift Cards as you're out and about. Buying them at a location that offers in-store perks or cashback can help a bit, and every penny saved adds up! You'll be able to combine them at
DisneyGiftCard.com, then use them to pay for your tickets.
Thanks so much for visiting us at planDisney, Marisol, and please let us know if we can help with anything else. I hope that you and your entire family have a truly magical vacation together!
Missy