Sitter gonna quit on us

My bubba is an absolute angel when he gets watched by someone at our house. My mom, sister, and husband have all kept him many times during the day at our house. He is the best and happiest little thing. He usually will cry a little if he’s tired. On days my husband works (he does 4 on 4 off), he stays at my SIL’s house. the baby screams as loud as he can most of the day. He hardly naps and even when he does take long naps, he still cries and screams when he’s awake. My SIL said she would try one more week with him but at this point she’s going insane as she has two kids of her own to watch.

Almost all of the daycares in our area are full (like 8+ month waitlists) and at that, they are $700+ a month, which at that point it wouldn’t be worth it for me to work. I just don’t know what we’re going to do. I’ve taken some of his favorite toys, his bouncer, an exersaucer, a swing.. everything I can think of to help her, but he just cries. He was great for the first few weeks but now it’s so bad.