It might also be worth considering if your husband might be more welcoming if you adopted a neutered boar?
Could be a gender thing, he might see lady pigs as ladies' pets, but if you brought home a little neutered boar he might find he has more in common with him- my husband has a very close bond with both our boars, he loves the lady pigs but it was our first little boar who really put the paw prints on his heart- boars often have hilariously straightforward personalities and like food, naps and pretending to be manly and dominant even though they aren't usually, and they are less complicated than lady pigs- they will adore anyone who brings food!