This little bit of dialogue I have found to be one of the funniest moments in MITM, but I can't remember which episode it was in.
In which episode did Hal and Lois have money problems including following conversation:
Hal: "That's it, no more eating our in fine restaurants, we can't go shopping for new expensive clothes!"
Lois: "Who's life are you living, we do none of that stuff!"

I know that's not much and they seem to be having money problems all the time, but if you've seen this episode and can remember it better let me know.

Cheers!