What I found at Princess Auto that works really well when you have a project on the go and space is limited is Wheel Dollies. They are awesome. When you're not working on it just push it in the corner.
Here's my garage today with all our vehicles and clutter. The garage is heated so why plug in a vehicle outside in the cold.
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'68 Parisienne 2+2 Convertible Matador Red (Resale Red but not for sale).