Bargaining with potential landlord
I saw a nice condo for rent yesterday with most of the features I'm looking for. Two serious issues were: 1) the development's borders are next to a heavy-rail line, and 2) the landlord wants to keep the half-garage as storage space (condo owner moving out). I know that the first issue is just something I have to decide if I'm willing to live with. However, the second is something that deeply concerns me. The landlord assured me that I would get a permit for the plentiful permit-only parking. That's first-come first-served, and I work pretty late into the evening, so I might have to park a quarter-mile away or outside the security gate.
Is it reasonable for me to ask some major fraction of the cost of a garage-sized storage unit off of the rent? Or the insurance bump for unsecured parking?