[lucumo]

It may be emotionally hard to cut your losses, but it may be economically sound.

There's a concept in economics called "sunk costs". You can't recover your investment, so whatever your choice, the money's gone. The only choice you have at this point is: do you continue or do you stop?

Since it looks like you have to pay more for continuing (and maybe even more after that) you should contrast that to the costs of starting over. It may be better to stop and try again if that's cheaper. It feels terrible, but it can be the best choice.

[froo]

  There's a concept in economics called "sunk costs"

In Poker its called "knowing when to fold"

http://en.wikipedia.org/wiki/Betting_(poker)#Fold