Guaranteed demand, parking (there are legal issues where being an individual or first party business owner of vehicles is easier than being a ZipCar).  You&#x27;re leasing cars for ~$500&#x2F;mo for 36mo each. That gets paid regardless of demand.  If your stable gets used enough to bring in &gt;$500&#x2F;mo in external customer net revenue per car, that would be pretty exceptional.  Most likely you&#x27;d make $100&#x2F;car&#x2F;mo and get a bit of extra professional maintenance for the fleet vs. just owning them and having a dealer service.<p>What&#x27;s interesting is if car manufacturers start to develop vehicles specifically for this kind of market.  I&#x27;d love to have personalization settings (nav, seat, climate, driving controls, etc.) which follow me as a driver across a fleet of identical or related vehicles.  You might also have a &quot;valet mode&quot; (some cars do now), &quot;renter mode&quot;, and &quot;owner mode&quot;, with different performance limits (I can ruin a $1-2k set of tires in 10k miles of spirited driving, but if I ran the right profile on the car, I could make them last 30k miles).  Might also make some maintenance&#x2F;safety things non-overrideable for renters -- you can&#x27;t start the vehicle if the brakes&#x2F;tires&#x2F;fluids&#x2F;etc. are not good, for insurance and vehicle-damage reasons.