Again it's important to understand that this site is comparing like-for-like properties. The rental rate for a property in NJ that would sell for $500k is going

Again it's important to understand that this site is comparing like-for-like properties. The rental rate for a property in NJ that would sell for $500k is going to include the taxes the property owner is paying. Landlords aren't going to service those taxes (or maintenance or whatever other costs there are) out of the kindness of their heart. They've built that into the per-month rent they charge.