So basically, you want to subsidize transit by making the transport authority be a slumlord. Got it.
There are no unsubsidized urban transit services in the US. Even operating costs are not paid from fares. And new transit construction is COMPLETELY subsidized.
I live in Seattle and I will have paid around $20k in car tab fees alone by the time the choo-choo subway train expansion here is done. It won't go anywhere near me and it will make my life worse, by inducing even more traffic.