Should the aerodrome say "it's OK, we won't charge, leave it in the hangar as long as you like, we understand your predicament", or keep charging you?
Free hangarage is very rare for any length of time. Think of it (and landing fees) differently: The person you're attempting to negotiate with probably wishes that they could afford to fly around in a plane they own. They will see it as cutting into their (the airport who pays them) income if they say "it's okay" and don't charge you. What's in it for them to not take fair payment for a service provided?