Sleep schedule/arrangements

So we are a family of 5, mom, dad, 4 yo, 2.5 yo and a 14 month old.

We live in a 2 bedroom apartment and my 4 & 2 year old share a room. We currently have our 14 month old in our room and it’s suddenly becoming the worst thing ever. We have always moved our other kiddos into their own room by 6 months old ( we previously lived in a 3 bedroom house.) now we have 1 less room and our 14 month old is still in his crib in our room. He goes down for naps and bedtime nicely, but the moment my husband and I enter the room to go to bed he is awake crying and won’t settle until we bring him into our bed where he immediately knocks out. As you can imagine this is uncomfortable and leaves my husband and I no time together at all.

I want to move his crib into my other kiddos room, but my 14 month olds nap is different than my toddlers nap schedule due to them having ABA therapy during his nap time. Obviously my others play in their room and don’t understand why the would t be able to play In there.

Has anyone ever been in this predicament and have FRIENDLY advice?