Look at Rutgers Summer Acting Conservatory. Definitely beyond your budget as it’s set now but exactly what you are looking for otherwise. It is very close to NYC so lots of side trips there as well as industry professionals who speak to the students on various topics, intense Meisner training, serious acting students your age, 4 weeks. I think they are still taking applications. You can earn college credit as well so you know it is intense. My D opted not to take the credit because it costs extra and we weren’t sure whether it would transfer because we didn’t know where she would land. But D found it life-changing. Good luck!