budget advice

hiii!!! I've been lurking for a while and I've absolutely fallen in love with neocaridinas, and plan on getting some when I move.

my only problem is that I have no idea how much money I should budget for everything. I've done my research for care and food and filters and tanks.

how much do you guys typically spend on your neos? how much was it to set up? what would you say is a good amount to set aside for a monthly budget for them when I get them?