Cycling’s an expensive hobby. There’s just no way around it! The equipment (both bikes and clothing) is both pricey and numerous in needs (and wants). Upgrades to said equipment is even more expensive. Nutritional products can be yet another way break the bank.
CoachLevi.com did a great writeup/list of replacements for on-bike nutrition/snacks, lending itself to some cost savings.
Expensive Energy Gel Replacements