I think that it would benefit from outriggers
Any lift is helped by enhancing stability. Under the right conditions of use, it is possible to forgo a wider stance safely if the lift is minimal and the movement linear along the lifting arm - on a flat floor, no obstructions.... and many other conditions.
In a small or crowded shop, such as mine (perhaps yours?) a small footprint crane can be used to great effect if used responsibly. I would have to see the entire rig to criticize it, but I don't have access to the whole article. I have been thinking about building an 'ultimate' shop crane - with an adjustable width parallel legs, and legs that extend out narrower and farther than a normal 'Engine Hoist', and back into a 'mule crane' configuration (with a counterweight), and much higher lift height. I'm not convinced that it is worth the work. But it sure would be a fun project!
On the other hand, I've complained about the splayed legs before on here. I wish they could be adjusted sideways.
One of the things a custom build can address.
Mine folds up and stores very nicely. Just lift the boom straight up
I find the standard hoist in storage to have floppy legs, which makes it a bear to move around while folded up. On my hoist, I haven't found a restraint that worked. Another reason to do a custom build.
I've learned a lot from the big yellow crane
@johnnielsen found (and is now in his shop - it is too big for mine). It is a Canadian made engine hoist lifting a maximum of 3 tons, but has a far higher safety factor than a PA hoist. Parallel legs, and adjustable length are possible and desirable.