"Toys" in the bedroom

From what I've read there is no yes or no answer in regards to sex toys. Some say they're fine as long as your not replacing your husband. I'm not looking to replace my husband but I'm looking to see if it's fine to use when my husband isn't up to doing anything. He had a bad accident years ago that affects his sex drive and has caused erectile disfunction. When he is up for anything more often than not his needs are taken care of and I'm left wanting because he's tired and aching from his usual pain on top of his job adding to it and he's ready for sleep shortly after. I've talked to him about this and he apologizes but it's still the same thing over and over. He's not against me using a toy for when he's not in the mood or when his needs are met but mine aren't so I won't be doing anything that he doesn't agree with. I'm just not sure if I should get one.