It was a Tuesday night, I couldn't sleep, and I was three episodes deep into a backyard makeover marathon. Before I knew it I was on some website configuring a 6-person spa with LED lighting and a built-in Bluetooth speaker. I even paid for white-glove delivery. The hot tub arrived two weeks later. My apartment has a balcony that's 4 feet wide. The hot tub is sitting in a storage unit now and I'm paying $180/month to keep it dry. I've never used it once.