SOUNDS????????

Where does one start? I eventually want to build planes for sale and I am wondering how ot go about getting my own sounds. I would love to rent a spit for a couple of hours and runn the tape recorder, but lets face, I don't have access to a spit. So how does a person get a set of sounds that you can be copyrighted? Are there sound designers out there that could be contracted out? Would they take a flat rate or want a percentage? What is the going rate for a sound set? I know how to cut and paste sounds, but if they are someone elses sounds, just hacking them up and disguising them, is still illegal. So......anyone who has any ideas, I am all ears!!!Cheers