Yes, but the tricky part is finding one who is TRULY capable of reproducing someone else's work as opposed to some hungry tattooist who SAYS he/she is capable.
Many/most of the truly capable won't bother to schedule an appointment to reproduce someone else's work because they are plenty booked up doing their own designs.
yes. only needed if you want/need to discuss the artwork, style or placement of a larger piece. Also could be needed if you're looking to get a piece by a high demand tattooist.
Almost 4 months later your tattoo shouldn't need any special soap at all. Also shouldn't be reacting differently than any other part of your non-tattooed skin.
2-3 weeks isn't entirely abnormal for return visits, but I'd expect that they'd be working on parts of it that haven't been touched yet, and that you'd have at least a 3rd visit some time later to at least touch up older work.