Layla has asked a question on advice for starting a research group. While such a question at first does seem too broad, it also strikes me as exactly the kind of question that should be a "community wiki" question. It's a very pertinent and relevant question, but it should be a crowd-sourced solution, not an individual writing a single all-encompassing answer.
Just asked about this in the mod chat room, they linked to this blog post, which pretty clearly states that posts like this should not be converted to CW. The whole post is pretty interesting, actually.
I don't think it is a good question for CW. Any specific advice is going to be too localized. For example, if you are teaching at an undergrad only institute, your lab is going to be filled with RAs and postdocs while if you have access to strong PhD or MSc students you will want those in your lab. Same thing for equipment and resources. It depends on the existing departmental resources, your startup package, and needs.