How much we can help someone without motivation?

After trying my darndest, and pulling out all sorts of fancy techniques, I have concluded that there is a base level of motivation that the client must have, or there is nothing that can be done. The clients that think that they can simply pay me and have me make the changes for them magically are the ones who are unlikely to get what they want. As we know, I can't "fix" them.

This is especially true for behavior change. In my area of weight issues, while the resulting lifestyle will be pretty easy for them, the change itself will take some effort (Patience, Practice - as in daily practices, and Persistence).

I suggest that you be up front with your clients and suggest that if they want to experience hypnosis, that you take them through some relaxation trances. These will be enjoyable for them and create a positive association. Then, when they are ready, you can do the work.