If your access to a physical firing range is limited, what do you think is the best alternative?
I had the joy of dealing with this issue when I worked in the S3 section for an ILE BN transitioning to a new mission and we had no weapons what so ever.
My first suggestion would be see if you can piggy back with a unit that has lots of what you need...supplies and range access. Work a deal, they let you tag along you clean some weapons.
Another suggestion is to hit up some other local posts....I did this frequently while I was at Ft. Belvoir You can borrow weapons, take the classes the other post require to run the range, order ammo and you are all set for a fun day of shooting stuff.
Finally if you are just looking for weapons familiarization there is always the EST 2000. I know its not the same as going to the range and no you can't use it for qualification. But, it is easy to get access to, just need to take a few classes to be certified to run it and you are all set to go.