I still have my vehicle, and my wife has hers. Between the two of us, we have 3 motorcycles.
Thing is, we would have those anyway, but I would be using my car, or one of the motorcycles to commute most days. So even with the cost of my bike (recumbent) and all of the gear, assuming reasonable costs of maintenance for tires/chain and other bits that wear out, I suspect my bike commuting will pay for itself in about 3-4 years, and I plan on owning my bike a lot longer than that. I haven't called to get a new quote on my car insurance yet, since I commute with it only about 3 times/month these days. I suspect the reduced insurance cost will make the bike pay for itself sooner. I still need my car though, since it's what I use to tow the motorcycle trailer to the track.