You have little to be concerned about. Many students find themselves in the same situation. We have several at our Club. (One is about to take the writtens for the third time) Your hours never "expire" and there is no limit to how many years you take. Just make sure your mind is clear to devote full focus to finishing the training when you're able. Most Clubs can and should accommodate intensive training at any stage. P.M. me if you wish.