Doable! Have done it before without any major problems. However, I don't have any stats about you and what the goal is...especially, why do you want stay on for 9 months ( 274 days or so) ? Just curious...You will grow more in the long run, taking breaks, cruising, giving your body a chance to reset itself, normalize as much as possible to what's considered normal (blood work); and I believe it will respond better to future cycles.