My dad has been working in Hoboken for a while but there’s been no mincha minyan there. If you get enough men then you can count him in. I don’t even think the chabad has a mincha minyan.
True, Rav Schachter doesn’t believe that oats is one of the five grains but the MAJORITY of gedolai poskim do hold it is… I think its told of Rav Moshe that he said that even if they were to bring a million raayas that oats is not one of the 5 grains, it still is because that has been our mesorah.
I’ve heard stories with Rav Shlomo Zalman that he took upon himself the chumra of being choshesh its not mezonos but then Rav Elyashiv told him not to and then he stopped. When asked he told others to just do like the our mesorah and don’t be choshesh.
The whole assumption of the title: “How to convince 18 year old that getting a job is as important as learning…” is incorrect. Getting a job may be important, but learning Torah is the most essential component to living a Torah life. At his young age of 18 years old it’s gevaldik to have the type of attitude he has considering his background. Once he matures a bit more, you can tell him the importance of getting a degree, but right now he’s at the age in which growing in learning is so significant.