Grand Theft Auto V (Xbox One)

For this achievement you need to purchase every upgrade for any car, I did this in story considering everything is cheaper in the story and is easier to get money. Anyway go to any of the L.A. customs and use any car I picked Michael's car after jimmy stole it and upgraded it and do finished all the upgrades. I bought everything in each category just to make sure the achievement popped. GOOD LUCK TO ALL MESSAGE FOR HELP!!!

If people are still having issues try reading thru the comments and see if anything works for you! Everyone is leaving good tips!

People asking if this can be done ONLINE. The answers is yes! But will cost you way more money. Easier and cheaper to do in story mode.

Edit: Make sure to leave the customs shop to make sure the achievement pops!

For those who still got trouble with this, here is a tip. I did evereything described with Frank's car and the achivement did't pop. After that i went to the LS Customs that you can buy and i bought. Did everthing again with a random sedan car and then i got the achievement.
Make sure you buy the tires stuff (smoke, bullet proof, etc)
The Neon lights

Turn off the auto save berfore doing this so you don't lose your money.

I got this as many others described with a random car and picking the most expensive options. However it should be noted that if you get all the mods right for the achievement the achievement will only pop AFTER you exit LS Customs not while inside in the mod menu.

You can easily do this by playing as Franklin and buying Los Santos Customs and then mod your vehicle entirely so you can purchase mods for free (you can take some mods away afterwards), or just have a couple hundred thousand, maybe a couple of ten thousands as any of the characters and then buy the car mods.