Hi @Branden Lawsonwelcome to Extreme Kites!
Your on the right track with what your looking for in depower kite size ie. you mention an 8 meter. 8 - 10 meter depowers should have you going in the wind range you mentioned. Not sure what the used market is like in your area, however you could look for a used Ozone Access 10m which is friendly to learn depower with and is very forgiving with gusts. You could even look for a 9m frenzy too if available which would have as much power as the 10, just a little more advanced kite great for land boarding. Depends on what is around for you - second hand is always a good option to learn depower kites and then if you wanted to buy a new kite, you'd probably then be more comfortable going bigger as you'll know how to manage the kite and utilise the depower and power when you need it. Many advantages with the safety systems too in gusty weather. Let us know what your options might be and someone will always chime in to give you a helping hand.