To make eConomy dollars easily in this game you will need the following items:
1. Iron pickaxe+
2. Maybe a few stacks of dirt or something that you don't need (for mining)
3. Torches (or a mine you can use).
What you need to do is very simple (it barely needs a guide).
Mine redstone! Redstone is super abundant and so you can find vast quantities of redstone blocks (which contain 5 redstone dust pieces each!). You can sell these redstone dust pieces for 40ea at the server shop (at the spawn, NOT THE SPAWN MALL). Making each redstone block worth 200ea, more than a iron ingot which has been refined, even more than a gold ingot (if you sell it at the server shop). Collecting vast quantities of redstone dust is extremely easy and you will find yourself with stacks of it in no time!