Recoil, negligable. Much less than an AK. I have been to MP-5 operators course and learned how to fire an entire 32 round magazine, full auto into a 1" circle at 7 yards. Learning Phil Singleton's (Ex-SAS) method or controlling recoil is WAY cool. M-16 and Thompson on rock and roll and keep a 5 shot burst inside a pie plate at 75 yards.
Cost, expect to pay 7-10k for are real one. Plus $200 transfer tax plus 8% (or so) sales tax. Can get you to $11k in a hurry.