I’m in my 70s but we had 4 kids – so can completely emphasise.
My last car was a PHEV – just over 30 miles on electric before going to petrol.
Dont know if there are any suitable PHEVs on the scheme – but that would be a good halfway point – Im guessing you do a lot of local runaround’s – school, clubs etc – would certainly make a dent in your fuel bill.