I feel like with the ones closest to her(I.E. having her inside of your body 24/7), she actively blocks you from any real material success. I’m not the only one that feels like this. One of her greatest devotees, Sri Ramakrishna, felt the same way. He would talk about being absolutely desireless and egoless. He would teach his disciples to ask her to remove every “want of the world”…he was always blissed out because he would let her do everything. That was her bliss. If he didn’t allow it, she would have made him miserable.
Here are some quotes from wikipedia about another one of her devotees named Ramprasad Sen, a poet from back in the 1700s.
“Rāmprasād comments in many of his other songs that Kāli is indifferent to his wellbeing, causes him to suffer, brings his worldly desires to nothing and his worldly goods to ruin. He also states that she does not behave like a mother should and that she ignores his pleas:
“Can mercy be found in the heart of her who was born of the stone? [a reference to Kali as the daughter of Himalaya]
Were she not merciless, would she kick the breast of her lord? Men call you merciful, but there is no trace of mercy in you, Mother. You have cut off the heads of the children of others, and these you wear as a garland around your neck. It matters not how much I call you “Mother, Mother.” You hear me, but you will not listen.”
”To be a child of Kāli, Rāmprasād asserts, is to be denied of earthly delights and pleasures. Kāli is said to refrain from giving that which is expected. To the devotee, it is perhaps her very refusal to do so that enables her devotees to reflect on dimensions of themselves and of reality that go beyond the material world.”
So all in all, getting serious with Kali will transform you 100%, and if you don’t allow it, she will deliver some pain. Mentally, physically, and spiritually. Not that you are doomed to being broke or anything like that, just that your spiritual work takes precedence, over everything. You will be able to manifest “things” and have a comfortable life, but because she gave it to you, not because you used her energy for your own material gain.