Sorry i forgot to mention this: dont buy products that you need to replace. The carbon is good, but water changes are better. If you use the ammonia chips, then you will have to use it forever without problems. If you stop, then you run into a mini cycle but its easy to fix.
Most important thing you can do for your tank is the weekly water changes. You can get it straight from the tap. RO
water isn't worth it in freshwater systems.
I cant imagine you spending more than $40 for biological media. Dont get the bioballs unless you have a trickle system. They dont work well submerged.