The NO parishes around me receive over $10,000 a week, more than enough to keep things going.
And others are lucky if they get a quarter of that.
Even if they do get $10,000 per week, it doesn't strain the imagination to see how the parish isn't "rolling in the dough." Think of it this way, a not uncommon situation for many old NO parishes: A 100 year old church with a leaky roof, an old heating system, high utility bills, and other things in need of repair; maintenance of the parish grounds and a cemetery; a school with declining enrollment and rising costs; feeding, clothing, and housing a couple of priests, including related maintenance on the rectory; insurance; and assisting the poor.
If the parish is located in an inner-city area that has experienced a major drop in population as well,
e.g. Detroit, lower Mass attendance in general, and millions paid out as a result of pedophiles, it's not surprising that NO parishes are closing.