Just a suggestion.
Why don't we all set a weight loss target of 2Kg a year? If you can't reduce your weight by 2Kg a year then you may as well just call the whole thing off.
2kg a year is 20Kg in 10 years. That's significant amount of weight loss, it's even more if you lose more obviously, but just aim to be lighter by 2kg every year, on the same date.
That makes it quite easy to recover the situation every year.
As I posted before on this thread. Very few people have actually lost weight during the life of this thread.