I would definitely give Motability a ring and see if they’ll extend for 6 months until you’re back on your feet, that or ring the grants team and go for the full 2 years, take the pressure off.
I hope you’re better soon.
I'm Autistic, if I say something you find offensive, please let me know, I can guarantee it was unintentional.
I'll try to give my honest opinion but am always open to learning.
Mark