I hear ya. I wish I had a garage period. Living in an apartment, parking in an underground parkade, and having to store my tent in a storage locker forced me to dig deep to come up with this lifting frame. The two main requirements were: easy to use (i.e. sufficient mechanical advantage); and quick to install.I like the look of your contraption. I built a gantry on the cheap, using a couple 8' ladders, a long 4x4, some pulleys, and a cheap harbor freight electric winch mounted in the garage.
It's a hassle to setup and use, but it does work. I'm always looking for easier solutions though and this fits the bill. If only my garage was tall enough for a ceiling hoist....
I had thought about the type of setup you're using but given my need to load the tent on the road in front of my apartment the DIY ladder gantry was a no go.
Thank you for demonstrating the proof of concept for the ladder gantry system...much safer than trying to load a RTT without significant muscle power.
I had designed and built a more complicated roof mounted folding crane but it was way too heavy for a single person to deploy and was still a handful for two people. Here are a couple Sketchup images of the folding crane:
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