Would laser Lipo work for me or is it a waste of money? (Photos)

Thanks for your question and pictures.  Liposuction is typically best for patients that have good skin tone since the skin will need to retract after fat is removed by liposuction.  Adding a modality such as laser (SmartLipo) or radiofrequency energy (BodyTite) can lead to some skin tightening.  BodyTite is a newer technology that shows more significant skin tightening than SmartLipo and may be beneficial for you depending on your goals.  Your skin shows significant stretch marks so even with BodyTite, you will likely still have some skin laxity after liposuction.  Ideally, a tummy tuck would be your best option.  You may consider a BodyTite procedure (contouring but not weight loss) to help you "jump start" your weight loss process and then plan on a tummy tuck at a later time when you reach your goal weight.  Meet with a board certified plastic surgeon for an in person consultation.

Concerns about the appearance of the abdomen are very common among patients consulting with a plastic surgeon. Just like every patient is different…so too is every abdomen. Different problems require different solutions. Your board certified plastic surgeon is uniquely trained to identify the problems as well as the appropriate solution.
The abdomen is commonly addressed via liposuction or abdominoplasty (“tummy – tuck”). Which procedure is best is dependent upon the source of the problem. 
Excess fat deposits underneath the skin can be addressed via liposuction. Liposuction will not address any other issues and may worsen the situation if there are other factors at play (such as skin excess and muscle laxity, see below)
Commonly patients concerns are centered around issues of excess skin as well as fat. A third factor, which is often overlooked by most patients is abdominal wall muscle laxity (typically seen in post partum mommies).  The tummy tuck, also known as abdominoplasty is a surgical procedure designed to eliminate excess skin and fat and tighten the muscles in the abdominal wall to create a smoother and slimmer contour. The tummy tuck is designed to target areas of the abdomen that have not responded to diet and exercise, making it particularly popular among people that have a lot of loose or sagging skin around the abdominal area due to significant weight loss, as well as women with excess skin and stretched abdominal muscles following pregnancy and childbirth. 
Candidates for tummy tuck should be already at or near their ideal weight for optimal results. It is recommended to women that are planning on becoming pregnant to postpone the procedure until they are finished having children.
Based upon your photos alone,you may benefit from a full tummy tuck. You have significant skin excess and laxity. The potential for tightening post liposuction is minimal in light of the stretch marks (dermal tears) which are the hallmark of skin with poor inherent tone or elasticity. Liposuction alone is likely to worsen the problem. While it is true that laser liposuction/SmartLipo does confer some degree of skin tightening secondary to the heat from the laser, your situation is unlikely to improve significantly without excision.
As always, discuss your concerns with a board certified plastic surgeon (ABPS)