v-spec is great, I would roll that plant no problem.

I would definitely get a few sets of wheels/tires- blocks (Panther Komodo Dragon), pins (Panther Gators) and an intermediate block (Panther Komodo Dragon 2) should have you covered. I would recommend the medium-soft compound for all around use. I recommend Panthers because you can find them pretty cheap and they are good tires. Panther sells their dish wheels in a 12 pack (3 sets) for ~$40. Tires are around $20/pr x 6 pairs, so that is $160 for wheels/tires, a few more bucks for glue.

The Z590M steering servo is a good servo, don't get me wrong, but get a JR Z650M to really throw those tires around. Get a Z650M (about 2x the torque of the Z590M), and move the Z590M to throttle detail. That is about $60 for a Z650M.

Get 3 sets of different rate springs (soft, med, firm). At $7/pr x 6 pairs (2 pairs = front/rear), that $42.

The stock clutch bell is 13T. I would get 12T and 14T clutch bells. The 12T will give you more power up front for the holeshot and a 14T will give more top speed for a longer track. Clutch bells run ~$16/ea, so that $32.

Get replacement parts- front upper/lower arms, rear lower arms, wing, wing mounts, clutch shoes. Stuff breaks at the track. Those are the most common parts. Say $50 for that stuff.

Get an assortment of diff tuning fluids and shock fluids. Those run about ~$3/ea. 3 bottles shock fluid and 4 diff tuning fluids will run $21.

Get a starter box if you don't have one.

That will get you up to $400 right there easily, but it will get you great tuning ability which is a key for winning races.