The only reason would be structural. If you don't have a basement, or the flooring in the house can't take the weight of the plates. Otherwise it's 1000% worth it.

I bought my rack about five years ago when we moved into a house that had room for one and I love being able to lift whenever I want. I don't have to pay a monthly membership, wait for an open rack, wipe up someone else's sweat, or any of the other annoyances of a gym.

Do it. You won't regret it.

Edit: dumbass autocorrect