J.T.
Getting a Lap Band or other wt loss surgery is not an easy out. There is an entire process to go through before a Dr. even considers you a candidate for surgery. Most reputable surgeons are not going to operate on you without you going through all the pre-steps, including talking to a psyc professional.
Often, you have to lose 10% of you body wt before any Dr. will operate. This is to show that you have the discipline to actually do what you need to do in order to lose wt. It also greatly reduces your chance of complications and does a lot to increase your overall health.
I am not intending to be rude or insensitive here but if you are not in the right frame of mind to exercise now, what makes you think that you are going to be there after you have surgery?
I would highly recommend you get some therapy for dealing with your mother's death before you even consider going under the knife. Wt loss surgery is not always successful and if you do not take care of the demons that made you gain wt in the first place, you will only gain all the wt back. Once the stomach is stapled or otherwise restricted, it can still grow.
Please seek professional help.
Best of luck to you!