Not enough experience points

The threat value of ships (defined in the carcass.xml file iirc) is also used in exp calculations, you could adjust those as well but you'll have to edit each ship type. It's faster to just change the multiplier in the script as Goblin Wizard pointed out.

[Szpaku]

is it possible to make perks cost less Exp points? like changeing FTU werhouse perk from 75 to 20 or somethin smaller?

[Goblin Wizard]

..\Data\Scripts\include\PilotProperties.script. Perk is called Black_Market e.g.

Black_Market =	{75,{"lucky_1"},{}},

75 is your number I don't know if it works with started game.