Opinions welcomed

I've always been on the tired side.. I love sleeping! Of course with a baby in the household, where I provide 24/7 care makes it harder to sleep so well. I feel like I'm finally getting use to it. My son is 6 months, formula fed and only gets up 1-2 times a night.. I consider myself pretty lucky except SO and I can't sleep in the same room because he's so loud ( snoring, talking, moving ect) it wakes me and baby up! Welll anyway getting side tracked, I've had baby fever really bad already. I know I want to give my son a sibling but wanted a 3 year gap. Back to my sleepy side.. in your opinion is it easier to have children close together to get over that hump of less sleep, or to resume after a few years? I think it will be way harder for me to adjust again to a newborn waking up after I've gotten good sleep for awhile again. It's kinda silly, but any thoughts?