you can also spend a lot less and still have tons of fun with it, I personally have 3 cheap midi keyboards, a pedalboard I midified myself and two launchpads and it works great, total expense was definitely under $1,000
In terms of HW I can strongly recommend the Metzeler Silbermann [1], not that expensive and extremely satisfying to play.
As an autodidact I am definitely limited in what I am able to play, but it is still amazing to learn Bach pieces: I have listened to Bach's organ repertoire all my life since I was a kid, but learning a piece shows you a lot more just how amazing the music is.