This is just an idea, but it sounds like you have a hindering emotional reaction to large sums of money. I wonder if you could "disable" that reaction by using a new representation that your unconscious mind wont recognize. Like if you think about money with scientific notation for instance.

>I earn 1.5E5 units per year. After 20% taxes that's 1.2E5 units.

>My mortgage is at 4E4 units.

etc