For freestyle, if you build the right quad with good components (RaptorQuad.com frame, $11 RS30A-V2, $11 rcx RS2206-2400 V3, revolt FC, X4R-SB, TG 4S-1300-65c), you rarely brake anything but props. It took me 13 months, 10,000+ flights (250_ hours) to break one arm on my Raptor quad, nothing else but 37 cent props.