To get this achievement, you will first need to purchase every weapon. I have a price guide for this on another solution.
Solution for Item Master In Cracking Sands (WP) After purchasing every weapon for a total of
$14,590, you then need to fully upgrade them up to level 5. The only exceptions are the Boost, which cannot be upgraded, and the Magnet, which can only be upgraded to Level 3.
Note: The cost below each section does not include the cost of the original weapon.
OffensiveMinigun -
$500 (already unlocked) >>> $500 > $600 > $700 > $1,000
Rocket Launcher -
$750 (already unlocked) >>> $750 > $900 > $1,200 > $1,500
EMP Blast - $330 >>> $330 > $360 > $390 > $600
Freeze Gun - $440 >>> $440 > $480 > $520 > $800
Tackle Force - $660 >>> $660 > $720 > $780 > $1,200
Plasma Gun - $990 >>> $990 > $1,080 > $1,170 > $1,800
Vampire Gun - $1,430 >>> $1,430 > $1,560 > $1,690 > $2,600
Drag Beam - $1,980 >>> $1,980 > $2,160 > $2,340 > $3,600
Guided Missile - $2,640 >>> $2,640 > $2,880 > $3,120 > $4,800
- - - - -
$50,270
DefensiveMines -
$300 (already unlocked) >>> $300 > $400 > $600 > 800
Shield - $400 >>> $440 > $480 > $520 > $800
Flash Bang - $500 >>> $550 > $600 > $650 > $1,000
Spikes - $800 >>> $880 > $960 > $1,040 > $1,600
Flares - $1,200 >>> $1,320 > $1,440 > $1,560 > $2,400
- - - - -
$18,340
VehicleBoost -
$0 (already unlocked) >>> N/A
Power Generator - $400 >>> $1,200 > $2,400 > $3,600 > $4,800
Cloaking Device - $660 >>> $660 > $720 > $780 > $1,200
Magnet - $2,160 >>> $2,160 > $2,520
- - - - -
$20,040
The combined cost to upgrade all the weapons is
$88,650 plus $14,590 to purchase all the weapons. This achievement will require a grand total of
$103,240.
After completing every race in the Career mode with three stars, I found the best way to gain quick money was to play Head of the Pack races in Single Race. Winning a Head of the Pack race will reward you with $4,950.
Please comment if you vote negatively. I will edit my solution to make it better.