Without buying used, your not going to get what you need. Getting 5-6ft of air in 10-15 is going to put you in the 6-8 meter range. These are not
cheap kites, and I would not recommend starting at this level. On handles (with your budget, forget de-power) you are limited to pretty much 3 kites-
Flexifoil's Blade.
Ozone's Riot.
Hq's Crossfire.
Again, back to budget, you can get in a 4 meter crossfire for this price. You will not be getting the power you desire, but that will come with time.
What you do when you start is get a smaller kite, learn it in moderate winds, get a larger kite for moderate winds, then use your small one for
higher winds. Then you end up with something akin to what I have. Again, back to cost. For what you want to spend, you can only afford an HQ new,
but there are used kites out there. You probably will not find a used Crossfire or Riot, because they are newer to the market. You will however be
able to find used blades. There will be a few series 3s around, but you will probably run into more series 2s.
I very highly recommend that you start somewhere around the 3-5 meter mark, and the closer you get to 5 meters, the more I would recommend you start
out in very light winds, and be very cautious.
As for having one kite for traction..... well... if you get serious about the sport, you will have to have more. Especially if you want to ride
winter and summer. Summer winds are slow and non-existant, winter winds usually blow like crazy.
Hope this helps, and feel free to ask more questions..
Scoop