There's cheaper power chairs out there.. the Air Hawk is like $2k, though obviously not for everyone. These aren't going to be fitted or customized for your injury/ability, so they'll be worse but cheaper.
Yeah but if I'm going to sit on something for 14 hours of the day for every day of my life it better be comfortable and not give me pressure sores. Also my level of injury necessitates lots of additions.
Oh, totally! There's a reason that such mobility aids are so expensive. My point was that things like the "Not a Wheelchair" can be cheap because they aren't used full-time, the same as for the Air Hawk.
There's a lot of people that use wheelchairs for part-time use. When I was considering getting one, I could walk a couple minutes but couldn't go farther without injuring myself further. Having something cheap that could get me some freedom back would have been worth it, even if it's not perfect.