I was thinking about Monk's money. We know he had $30.000,00 in a bank account. We know he had a pay-check of $5.000,00 for a job (genius epi) and that he gets some money (never knew how much) from the Police Department as a consultat. As he's far from work for heath treatment , I guess he still receives his salary as a cop, maybe a little less. So, money doesn't seem to be a big problem for him now. At Sharona's time, however, I think he was poorer because a pay check from Leo Otterman was about $1.300,00, if I 'm not mistaken, and his closet had only three or four suits (remember, the end of "goes to carnival"?) and it was really modest.
In spite of that, although he's is a better situation now, he still doesn't like to pay anything and anybody