I just found this video of someone showing how to do it. I always thought the money was represented by "F5 00 (your hex values)" and a random hex possibly in your values, but apparently it's represented by "1D (your hex values)" also with the possibility of a random hex. I have not tested this so please if you try this post if it works or not.
EDIT: I have found the values of my money in a HxD, but they are not represented by "1D", but by "F5 00". I am starting to think peoples games may be different, plus the title update change the values so sometimes I can't even edit all 6. - Ex: F5 00 25 9B 01 (this is $105,253) this is what my money used to be. But know it will show up as F5 00 25 9B 0C and if i even try to change the OC to FF, it will not work. So I am only able to change the first 2 hex numbers "25 9B" to FF FF