I agree with Maheshwari. Remember the gunas when dealing with money: rajas (too much control), tamas (no control), sattva (contentment, relaxed awareness, clarity of mind & purity of body). A very practical thing with money is divisibility: you can save just enough, give just enough, and spend just enough. Aparighraha means non-hoarding behind locked gates, and avoiding unfair methods such as bribes. It's wise to save and spend with common sense, no point in risking homelessness, and no point either in becoming the richest guy of the whole graveyard - if everybody were saving all they earn, it would deadlock the economy. It's about trusting the universe, including our ability to ride out storms.
Also, attachment/non-attachment is just as much in the mind as in the amounts. Before the fall of the Wall of Berlin, there were many West Berliners quite detached from their Mercedeses, and many East Berliners clinging to their Trabis (4-seated plastic minicars with extremely pollutant engines, and some farmers who parked those in barns got holes in them, eaten by mice)... It's all in the mind.
My 2 pre-Euro Pfennig :-)