In the UK you can buy a simple wheelchair for 132 GBP: https://www.uk-wheelchairs.co.uk/ugo-essential-self-propelle... And what look like slightly fancier ones for between 300 and 500 GBP: https://www.millercare.co.uk/collections/self-propel-wheelch... A magnesium alloy framed one is only 450 GBP: https://www.mobilitysmart.co.uk/magnelite-self-propelled-whe... So what am I missing?
There's another article by the same author about their quest to get a custom titanium chair paid for by their insurance - https://newmobility.com/finding-the-right-wheelchair/
It's really interesting to learn about all the variables that make a good chair - pressure distribution, the seat height, castor width, centre of gravity and other geometry variables. And all of those are unique to your body.
According to other comments here, a custom titanium chair costs about $4k, so $1k is cheap compared to that.