Question:
Could I use money that I was מפריש as חומש to use for personal use as a incentive for something רוחני?
Answer:
If it is meant for tzedakah, it can’t be used for personal use, because then it isn’t giving it to anyone, and like moving it from one pocket to the other.
Best Wishes
Sources:
R’ N. Karelitz shlit”a and other poskim