Figuring budgets is essential when prototyping. You may be making one for a client, investors, or we're pretty sure your significant other would be interested in how much it will cost. So, it's essential before actually creating your final design to figure out what parts you'll (most likely) need.
First off, a Skywalker EVE-2000 is $285 (USD) via fpvmodel.com. It's a PNP (plug and play) version (so it comes with all servos, motors, and propellers), so all you need to do is plug in your Pixhawk and peripherals, then fly.
So, a Pixhawk 2.1 ($215), pitot tube ($70), and rangefinder for landing ($159) bring our running total up to $729. We're going to go a different route for GPS.
Because (generally) we want mapping ...