Buying Intuition from 3 to 4 costs 20 karma (costs are level x 5, no level skipping).
Buying 2 ranks of perception costs 6 karma (not 4), unless you only bought from 1 to 2, not 0 to 2.
But the gist works fine. You can prob get that karma by dropping a drone, and the karma investments in pilot walker/water (save it for later growth).
I would like to soup up the van in bit more at character generation, as it is typically more durable than drones that you are more likely to quickly lose.
But a very nice rigger!