7D $1200
10-22 wide $800
17-55 2.8 IS walkaround $1000
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TOTAL $3000 (your original budget)
If your budget is actually 4K and you want to do night photography, suggest you add:
Quality tripod $500
Canon flash 430 II or higher $300
2 more CF cards $200 (moving animals + faster frame rates + shooting more RAW now, right? )
5D III is outside your budget, when we think of system cost. Anyhow, I reckon you actually can take better photos with a 28mm sensor than a 44mm sensor for general photography within a $5k budget, because of the better total system that can be bought.