Another question about my cats and an extended absence?

I've posted several questions about traveling with my cats. My husband was transferred out of state for 2 months. I was going to go with him and bring my 2 cats. One is sick with lymphoma, the other is 16 years old. His company was supposed to rent us a 1 bedroom apartment, but failed to do so. They instead rented us a efficiency motel room that doesn't take cats. We were able to find a place that does take cats, so I thought the problem was solved. However, my husband arrived yesterday and said the place is tiny and very dark, like living in a cave. The cats would have no sunlight for 2 months. I'm now thinking it would be too traumatizing to bring the cats (18 hour car ride each way, living in a cave for 2 months).

A week ago, my mom told me she had a friend who is in a difficult living situation and suggested I leave the cats at home and let her friend live here while I'm gone. My first reaction was Hell no, but now I'm rethinking this.

The problem is the 16 year old is already exhibiting signs of depression since my husband left. My sick kitty is VERY attached to me, and I'm afraid that he will also get very depressed if I leave as well.

Just looking for advice on what I should do. I quit my job so I could be with my husband. I really want to be with him, but I'm so worried about my cats.