Mobile first with attempt at accessible toggle switch

My biggest focus for this challenge was making the pricing toggle accessible, particularly for screenreader users. I read a lot of articles but they were mostly focussed on on/off toggle buttons and used checkboxes or buttons as their base HTML element.

Semantically, this toggle felt more like it made more sense as a radio group so I tried to start with those. I definitely don't think I've succeeded - please let me know what you think and link to any other options you've seen!