You can lower the food and weapon costs by picking up FF medals. The progress in TP medal for the demage and the progress in SS medal for the bonus strenght in covers some, but you are still in the red. Also, you need to burn additional energy bars, as the carrots do not really cover anything.
And then when you accomplished the base missions anyway, comes the one with the poisonous carrot. 10K PP is clearly not for for non-premium users, but actually nobody has a shot, who does not burn bars prime time.
I made it until the last misson, if I could, I would go back to the point when i started it and would choose not to participate solely based on the fact, that the run produced minus in my account while at the same time I am virtually unable to finish the mission.