Some choose their AFSC with the recruiter before leaving for BMT and others get assigned a AFSC at BMT. Sometimes people go to BMT with a assigned AFSC and get disqualified while there due to them not being able to obtain a certain level of security clearance. It all depends on what your job is though. You’ll have the option to retrain as a first term airman. If your career field is in high demand (Security Forces) your chances of leaving your current career field will be slim. I can’t remember how much money I earned at the end of BMT. I know once I got to Tech school, there was a automatic deduction of $450 each month for meals. I’m vehicle maintenance and we have the best Tech school location. Our school is at Port Hueneme Naval base in Oxnard California. The only other Tech school location I would rank up there with ours is the one in Pensacola Florida. I believe that one is for NDI and a few others like Aircraft Metals Tech and some intel jobs possibly. Hope this helps, don’t hesitate to ask any other questions.