Is it safe for me to do mommy makeover, lipo & fat transfer in the same surgery?

On blood pressure medication, I would advise against doing all those procedures at one time. I would suggest starting with the liposuction and perhaps the breast reduction. Once the excess fat is removed from the flanks, you may find you no longer have hip dips. Also, doing the liposuction first removes more fat from the abdomen. The tuck will look better if the fat can be removed first.

Technically both physicians are correct.
For a surgery of 4.5hrs, you are safe to proceed with a BMI of 33. The complication profile for that type of surgery does not increase substantially until you reach a BMI of 35. However, there is an increase in complication rate between the BMI class of 25-29 and 30-34. Furthermore, your best results will always be achieved after the maximum amount of weight loss.
In general, I would consider what the second surgeon is offering safe as long as your comorbidity (other illness) profile is acceptable. Due to the length of surgery, you may be required to take blood thinners after surgery depending, among other things, on your Caprini score.
Make sure that both surgeons you are consulting with are Board Certified Plastic Surgeons (not simply cosmetic surgeons) and that the facilities that they operate at are accredited facilities.

Medical history and BMI are very important on the evaluation prior to any surgery. A 30BMI or under is recommended to get a Mommy make over done so the aesthetic result is better and done on a safer way. My advice will be checking options to reach this 30BMI prior to consider doing a plastic surgery, this will help your Hypertension and will give you better results long term. Good Luck!