It depends what are your plans.If you want to win couple leagues without spending real money it is must have due to lack of vu items.
If you are aiming in high population city it is must have due to space savings. I dont see any other reason to spend so much simcash. I have 3 maxis and now trying to save to buy 4th. Remember that price for them increase after you buy so first cost 1000 2nd 2000 3rd 4000 and guess how much the last one.
