How many Jump Potion I can use per account?

Stop right there if you thought that I'ma noob and bla bla bla... I'm main WHM with v3s cleared and v4s progression. ( 10/16/17 patch 4.1) (yes ima pug anyway)

I have smn, sch, ast, whm, rdm lvl 70, but I dont have enough time to play to level up my other classes. So the question is: How many jump potions I can use to level them up? Can I use as many as I can buy or only 1 per account?

Hater:"OOh you have to level up them by playing so you can get the rotation bla bla... Jump potion makes the game suck..."
Me: Ok, so palace is a good option for you then?! Palace make the game good? Ok so make the palace great again. If i have the money (25 bucks) let me waste the way I want. :D I stopped buying coca to get this money. ;-;

No salty shirogane ppl or life-salty ppl here pls. Thank you!

you can buy as many as you want as of today for each character you have, so for the retainer lvl potions