I have a 300+ lb relative whose recently diagnosed diabetes might be controlled through weight loss. Anyone out there have any experience with liposuction at all? Costs? Limits? Good informational web sites?

Liposuction generally is not used for obese patients. There may be other alternatives; albeit some of them pretty drastic. Medical help should be pursued.
Joy

if you want a surgical solution, why not get your stomach stapled? worked for roseanne, that singer lady, everyone .