I think sometimes we can get too enmeshed in the words of Law.
Buying a car as a spouse, to use for your spouse and yourself will NOT be looked at unfavourably.
Common sense has a part to play in law, thank goodness.
Although, in retrospect, I do think it's not actually a contract if someone has been shown to lack capacity to sign a contract, so therefore the finance company might jib.
It is the same common sense that would protect my Mam if she signed a contract to buy new double glazing....what would protect her from such a contract, could potentially debar your husband.
Perhaps you should apply to buy the car in your name Tre and as it would be a viable purchase, any questions asked can be defended honestly?
The hoops you have to jump through. x
The latter solution seems to me to be the only practicable one, subject only to the caveat that it would need to be defensible if tre has PoA and is using her husband's assets to buy the car or fund the loan. Modest professional advice would, I am sure confirm that one. And I simply do not see how someone with a MMSE of 5 would meet the requirements in law that a person entering into a contract must have capacity.
Wirralson