Can I safely get arm lift, breast lift/augmentation and 360lipo/tummy tuck at one time?

Congratulations on your weight loss!  If you are wanting the best results, you will want to consider breaking these procedures into two stages.  Most surgeons prefer to limit the surgical time to 6 hours or less, and the procedures you are considering will exceed that time.  I recommend visiting with a board certified plastic surgeon in your area for a consultation.

Thank you for the question. Generally speaking, combination surgical procedures are done routinely. However, you are wise in being concerned about the safety of combination surgery; risks/possible complications do increase with increased length of surgery… In my opinion, the combination procedures you are considering would be too much to perform in  a single session.  
It is best to evaluate each patient's suitability for combination surgery on an individualized basis. During this consultation process, after a complete history and physical, the SAFETY of combining these surgical procedures becomes of paramount importance. Plastic surgeon, anesthesia provider, duration of surgery, surgery facility all important considerations.
Your best bet: choose your plastic surgeon very carefully; everything else including good judgment/advice/planning, anesthesia provider and safe surgery facility will follow.  Always keep priorities (safety,  avoidance of complications, and quality of outcome) in mind as you make your decisions.  Best wishes.