It may be worthwhile to consider the possibility of renting some short-term space (office or other). At first glance, this may not seem mustachian. However, consider the trade-offs between the scenarios. If renting a short-term space allows the income to continue to flow in, and helps you mitigate other costs in the process, then it may be worth it. My company deals with similar decisions on warehouse space, and sometimes the answer changes once you price out the scenarios.
Your advantage is that you don't need anything but space to store and access your product. Other renters might want upgrades to the space before moving in. In the commercial/industrial area, you might be a good fit for someone looking to cover the costs of their empty space.
I don't know how full your garage space is with this inventory, but from the perspective of selling your home, it seems like it's always easier to sell with less stuff taking up the space you are trying to show. So, not having the inventory sit there may make selling quicker.
