we have several multi-tenant / mini-strip malls around us.
all are different landlords
*  charges a monthly rental, seems like it is $300+ (high traffic, 7,k + cars a day) to have a tenant 
sign up, the tenant pays for the 
sign  / maintenance
                this pylon 
sign has ZERO tenants listed and 40% of the rental spots are vacant
*  charge a monthly fee, whatever the electricity usage is the tenant pays for the 
sign / maintenance
                 same high-traffic road, full of tenants
*  does not charge a monthly fee, the tenant pays for the 
sign / maintenance
                 Full of tenants
*  does not charge a monthly fee, free 
sign if you 
sign a 3+ year lease, tenant pays for the maintenance
                 Full of tenants and a waiting list to get in
Sounds like an opportunity, approach the landloard and offer to do the tenant 
signs for "free" if you get X months / years free to have your 
sign on the pylon
what about exterior 
signs on the BLDG? above your door, under your 
windows, etc...