Maintenance check on 2017 Forester in Camden/South Jersey

Hi all, I have a 2017 Forester with 73k miles. I did the 30k check up with my dealer and it was over $500. I skipped the 60k check because that seemed very expensive. I guess I have three questions.

1. When would be a good time for the next check? 2. Is that a normal price? 3. If not, anybody know any mechanics in South Jersey/Camden area that would be good to go to?

For reference, Jersey only does inspections on new vehicles at 5 years, so I'm not due until '22.