It is generally not advisable to have these three procedures done at the same time. Combining body contouring procedures such as this, especially when they are somewhat time intensive procedures increases post-operative complications.
These types of body contouring procedures are very common after a significant weight loss, but it is best to practice a bit of patience. You should consider factors, such as: is it safe? What might your recovery time entail?
Give it some thought, and decide on which procedure you absolutely can’t wait to have done, just in case multiple procedures prove impossible. It is advisable to first meet with a Board Certified Plastic Surgeon. The two of you should then discuss a surgery plan which is tailored specifically to your needs and goals and that prioritizes your safety.