I was wondering just as an example, if one were to have a strong desire to attend a gnostic retreat with their spouse, but the financial means were not available, would it be considered black magic to focus conscious efforts toward influencing nature to provide such a thing? I feel as though we are bordering on a gray issue, which we know ultimately leads into black magic.

Master Samael for instance in Introduction to Gnosis, speaks about using conscious efforts (or mental power) to improve our finances for example, or even to utilize the Tattvas in order to gain favor in playing the lottery. Obviously to attend a retreat would be a more worthy cause than to have a full bank account, but it's kind of the same thing since they both involve money.

What is the best way to go about such a thing without breaking any laws?