Chip, The Wandering Merchant

Just wanted to throw my champion idea out there, the name is up for debate, but I liked the general idea.

Chip, The Wandering Merchant passive: Teammates can shop while within 1000 range of Chip, chip gains 5% of whatever is spent as his shop. prices are 10% higher until level 6, 5% higher from level 6 to level 11, and same price from level 11 to level 18. Q: Buy and use a potion that heals 120 hp slowly (like the actual potions do), costs 100, 70, 70 with 2 possible charges, 35 with 2 possible charges, 35 with 3 possible charges. spending gold not mana. W: Buy and place a ward, costs 75 gold, upgrades the length of wards and cost with each level applied. at level 5 place invisible vision wards. E: Drain gold from the opponent drain 1,2,3,4,5 gold per second (per 100 ability power), lasts 1.5 seconds R: create a wave of gold, dealing damage to all enemies hit equal to 20,30,40% the difference in funds between Chip and whomever he is hitting, Costs 100,150,200 gold.

If you have any ideas on how to balance the character more, feel free to message me, I am up to suggestions, as long as the core of the champion remains the same.