George; changing from 7 speed is very expensive, you have listed barely ½ the cost items, as noted above, it is likely that your frame has 126mm spacing; 8 thru 11 speed require 130mm. So frame, new rear hub (= wheel or wheel build).

If you want brifters, get 7 speed Shimano A070 or Microshift SB-R472 for 2 x 7, or Shimano A073 or Microshift SB-R473 for 3 x 7, new cables, new housing, and keep everything else the same.