The reason she gained all that weight back over a six year period had nothing to do with achievable goals, the speed of her weight loss or any failure on my part, It had to do with poor lifestyle choices in regards to eating and exercise after she chose to no longer be in my control. She had the knowledge and tools to keep it off but chose (again for unrelated reasons) to no longer have the motivating factor of a Dominant "forcing" her to do those things (which IS specifically what she needs as a person).

In the case of both her original weight loss and what is going on today, there are no "goals" for her to meet. That is actually a motivational technique that is important to normal situations but irrelevant to our D/s based one (which IS the topic). The only motivation she needs is the same as with any other assignment a sub gets.. feeling her submission through performing the actions proscribed to her by Me as the Dominant.

My control is about her performing the assignments/activities I assign her on a daily, and even hourly basis, to improve her as a person (of which, losing weight is only one part). You are correct that it is extremely time consuming to have that responsibility towards another person. It also takes an extreme amount of patience and empathy, especially when her actions (or lack of them) means I have to stop my life to focus on correction of hers.

From a Pro/client perspective, I don't believe there is enough money in the world to make this service worthwhile for a Domme to actually perform. It is something that a Dominant, even a Pro, must get personal satisfaction from doing as it is so intense (the same goes with actually taking control of a subs finances rather than findumb bs). That doesn't mean a Pro Domme can't, or shouldn't, offer this type of behavior mod service to those they care enough about to be deemed worthy of it... They just have to know that the financial remuneration isn't worth the effort (unless the level of effort is only task assignment with no actual care as to whether the sub performs the tasks). Which means the Domme's rewards for Her efforts does have to be about something more personal as well.