What is the overall height of your Toy Hauler? I am shopping for a RV Garage and know what mine will fit in but should I upgrade in the future was wondering what the average height of a Toy Hauler is...
Can you open the 12' opening to 14' without to much stress to the existing header? What kind of garage do you have now? Metal sheet siding or something else? How tall are your current walls? If your walls are at least 16' you should be able to rebuild the door opening.