As someone who is shopping right now myself, I'd agree with a waste of capital. What you're most likely to do is buy up a bunch of stuff you won't need, and then have a list of other stuff the boat you eventually buy does need.
I like the suggestions to buy books instead. Seamanship, factual accounts, and even fiction.
Is storing the boat in your garage an actual requirement? Or would on the driveway/next to the garage work just as well? It affects what you end up with.
I'd also recommend this book: