I need some pointers, encouragement, help!

I have a 12mth old boy that started last nov. so when he was 10mths and has done two full mths and going on his third. He cries ALL morning! He eats well and sleeps everyone afternoon for 3hrs so at least he's got that right. He is a sibling and his 3 yr old sister has been here since 1yr with no problems. This little guy had a bad cold as a newborn that put him in and out of the hospital for a few mths of his life. Because of this his mom has major guilt and babies him a lot....carries him around, spoon feeds still, formula still, he's the boss...he tells how it's going to go at home. Mom comes in every morning almost in tears (some mornings actually in tears) because he start to wail as soon as she opens the door.

I can't termate because then I'd lose the sister and she's great. Plus I have one spot open to still fill after a mth.....it's slow around here. There's no way I can afford three empty spots.

I've tried everything. EVERYTHING! Carried him around. Wore him. Bottles. Sippy cups. Dancing. Tv. Food. Toys. Up in a highchair. In a bouncer. NOTHING works with this kid. Now when we go to playgroup or outside he's perfect! But it's when we are home he's cries non stop. He hates my home and being here. Lol. He cries through every transition...when I dress him for outside, when I undress him, when I change his diaper. When I lift him in the highchair for lunch, snacks. When I move him around to different toys. When I pick him up. Just cries cries cries.

With the winter we are inside a lot more and he comes in at 7am and goes to nap at noon. (Tried am naps, he just cries. Or sleeps then cries during afternoon nap). So for 5 hrs straight we are all listening to his crying. I'm in tears now as he's wailing . Sigh!

It's starting to affect the other kids. My 3yr old dcb says this morning....are you going to give him a bottle? Because he wanted the crying to stop. It's hard to do our normal indoor activities. Crafts, sensory play or just plain old playing. He cries through it all.

Big sister is no help. She hates him. I mean actually DISLIKES him. He'll crawl around after her crying and she'll yell no xxxx, no xxxx, go away. I don't blame her. He probably cries a lot at home and gets cater to that she probably gets ignored.

What else can I do? What have I not tried???????

Thanks for any pointers. Feels good to just vent it