I not think it issue to have premature babies in dayhome but more so, the health problem some have as result of it. I used have a severe disabled little girl here. She fed through tube, unable walk or talk even age 3, diapered, and oxygen tank. We had smaller portable tank when we go on walk and larger tank which limited range of movement inside to length of tubes attached to tank. Not really issue since she not walk or crawl.

For me, I would not take disabled child again. It very restrictive in term of planning and this child really needed one on one care.

Even with you potential client, chronic lung disease likely mean lower immunity with common illnesses that happen in daycare. I would be worried about another child be dosed and dropped and exposing this child. I also be concerned about if he need increased level care during day at cost of other children.

I think you need talk with parent, get real understand of what his daily life look like and then make informed decision.