I would suggest fitting in exercise wherever you can, so take the stairs instead of the lift at work, stand at your desk and do calf exercises (stand on your tiptoes then slowly back down) or butt crunches. The treadmill at 9pm sounds great, just 20 mins every night will make a massive difference and will help you sleep better too. It's hard when you are at the start and seeing a lot of work to do but it really is the little changes that will make all the difference and, in combination with diet and portion size, you will soon notice a massive difference.