From what I've seen a more professional security camera would cost quite a bit of money but if you are happy to invest I am sure it would be worth the investment. You would be able to get one of those ring doorbells I don't think the punters would mind or get one on amazon as I am sure that they are actually doing more just like it at more reasonable prices. Most places have video intercom these days but most people would ask about it before hand if they were that worried about it.