Depends on the location you order from. UK = 24/48 hours, Europe 2/4days, international 6/30 days! My quickest from the Hong Kong (international) warehouse was 6 days and that included a weekend. The parcel was actually in the UK longer than it was in transit
As for ambition, go for it. The "toy" grade quads (don't get me wrong, I love my Hubsan) really can't compare to bigger brushless craft. How much you spend I guess depends on your disposable income and what you want from your flying. For me, starting out, I'd rather something a bit cheaper than the F450. It looks a great machine don't get me wrong, but I know my props cost me ~20p each, each motor costs ~£8, the frame is near indestructible (bar the landing legs) and I fly like I have it in for my models
My next quad will be based on the
Diatone Whitesheep, a cheap rip off of the Team Blacksheep, if I can find anyone actually selling it. Diatone make the FPV250 frame btw, and it's bullet proof