If they do, women should be at least 25 in my opinion. Anyone under that should be in school. They also need to ensure her money is her own, ie no violent boyfriends taking it. And that the women is psychologically healthy and sexually healthy.
Some extremely disabled men (&women)have no choice. It’s a disgrace that such ones should be penalised and made criminal because of it. I’ve even known nurses pushed into such a role through pity, with no experience and far from psychologically prepared.