I'm not a track pro so take that into consideration (two weekends so far on my E92). I started to track my old 996 C2 and the engine failed (POS Motor) so I have been limiting my track time - aka I don't want to make it my primary hobby due to the high potential cost. Surfing and biking are far cheaper....
. Enough about me.
I think you are hitting the most important points with your plan but I would add a few thoughts.
1- coilovers make a huge difference with this car. I can't tell you how much more fun the car is on the track with a proper suspension. KW Clubsports come with camber plates and are a proven package. I also find them to be great on the street.
2- I would encourage you to get a separate set of track wheels and tires. Track time is very hard on tires leaves them with new rubber deposites and abnormal wear. Your street driving on the tires will often include new vibrations and poor wet performance. In addition you don't need to jump to R-comps as ultimate performance tires handle the heat on the track well (or at least far better than a Michelin PSS or PS2). I would argue that you will save money by buying a separate track set. The track and street tires will each last longer and you won't have to deal with the issues I noted above. Plus you will be able to get home if a wheel or tire is damaged on the track. Buy the wheels used for the right price and you will be able to get most of your money out of them when you are done.