No, your not too old, plenty of people in their forties completing line training.
CTC are good at what they do and you are likely to get a job through them so long as you keep your end of the bargain - 90% avg in aptls, first series pass in cpl/Meir and you can keep a check on your character. However, there is no gaurantees and if the economy goes sour in the middle of your training all bets are off! Also, it is the most expensive way to complete your training.
You've a good career, I'd think long and hard about giving it up. Only do it if being a pilot is what you really really want. You also might want to look at the modular route to training, it might be more beneficial for some like you.