I wouldn't worry a whole lot. The only flag that is raised is that you sold stuff to pay for it, which isn't that big of a deal if you didn't use that stuff anyways.
The problem comes when you go "hmm, I think I will purchases collectibles instead of making my mortgage payment/food/heat".
If you're worried about your spending, set a budget. While my numbers are not quite so large as yours (my income is likely also much less), I had to do a similar thing with eating/going out. Now that I have a budget, I can still enjoy myself and continue saving for a house.
And the fact that your wife seems to support your collection is a positive sign. When she begins to get worried about you, that's when you should seek therapy (amish has a great deal btw)