never knew there was similar products to the Planex. Never seen one at a home depot. Did look at sunbelt, $160 for a week, $510 for 4 weeks. So someone can buy a Planex and return it in 30 days get money back and maybe pay for some shipping, or they can spend $510 bucks and get nothing back. Or wait for a used one to show up on recon for similar prices to a 4 week rental, but have it for life, and or sell it on craigslist.
I'm not saying I would buy something, use it and then return it. But we all know a lot of people will.
You may be overestimating the visibility of Festool. We have one dealer in town, an Acme Tools, and I have only ever encountered one other customer in their tiny Festool area; 99% of the people I see come into that store swarm to the same brands they can get in the big box stores, likely because they have an account or something. Even then, it doesn't compare at all to the swarms in the big box stores. We're a 250k+ population Metro Statistical Area.
The one other Festool customer I encountered was buying a CT36 (or whatever they had in stock at the time; they only had a single DC, can't remember if it was a 36 or 48) and Dust Separator to replace his recently-dead vac and cyclone so that he could finish his kitchen project. His wife was with him and talked him INTO the cyclone and a set of bags; I felt like I was in the Twilight Zone.
In any case, they have a Planex in that store, but it probably has more dust on it from sitting than it would get from being used to sand drywall. I only know about Festool because I needed a HEPA-certified DC 5 years ago for some lead paint cleanup, and it was about the only thing I could get in town on short notice after a bunch of googling and searching. Any time I go in to ask questions about other Festool tools, they either don't have anything in stock and/or the staff have no knowledge about them and laugh and say "never used it, I could never afford that stuff..."
slavi makes a good point about asbestos, too, with rentals. It'd sure be nice if the rentals had waivers for people to sign about the hazards and did pre/post testing before renting it out again.