Everyone has their own personal preferences on the items you mentioned, so I'm sure you will have no shortage of replies to your query.
However, there are three extremely important items that you didn't mention, each of which is arguably much more important than any of the items you mentioned.:
1. An top end, reasonable sized (ie, 24" or over) monitor designed for photo editing, eg, one of the pro quality NEC units from the last year or two, eg,
this one. Do NOT skimp on this.
2. For a pro photographer, it is absolutely, utterly essential that the photographer has an independent and accurate way to regularly verify the calibration of their monitor. The above monitor comes bundled with a great hardware calibrator and corresponding software. I highly recommend it. If you get some other good, high end monitor (eg, an Eizo), there are several good choices for the calibration system, eg, Color Munki, some of the other top end X-rite or Datacolor products, etc.
3. At the risk of sounding harsh, 99% of the problems with people "going pro" are "the indian, not the arrow". For example, if she hasn't processed a few thousand pix in PS she probably doesn't have enough experience in PS. If she doesn't have a complete set of backups to her photo gear (eg, a minimum of two high end bodies, multiple overlapping lenses, a reciprocal deal with other photographers to sub for her if she gets sick and can't make it to a gig, some well written client contracts, a clear business plan, etc.), she's not ready to go pro. If she's going to start out shooting things like weddings and engagements, she really should second a more experienced photographer for at least a dozen or so weddings before she strikes out on her own.
HTH,
Tom M