Sleeping on different levels of house?

We think we will probably have to put DS2 in one of the bedrooms on the lower level of the house. DS1 is in his own room upstairs and our master bedroom is also upstairs. DS2 is currently in our bedroom but wakes up at 4am and I normally get up to feed him at 4:30am to get him back to sleep, though then I can't get back to sleep). We just tried putting him to sleep in the lounge room and he woke at about 4:30am (I think) but then didn't cry out for attention till 5:30am. From my point of view, I'd much rather be waking up at 5:30am than 4am! And I think this is best achieved by putting him in his own room.

DS1 and DS2 would probably be okay sharing overnight - I assume they wouldn't wake each other up.

But the daytime naps just wouldn't work out. Firstly because they are sleeping at different times (going up and down in the middle of the others' nap) and secondly because DS1's bedroom is the main playroom.

We could get a portacot to put up in the master bedroom for daytime sleeps if DS2's cot was in DS1's room but I don't really want that expense. (Plus we already have a kinderkot which lives in the car and we use when we are away from home for DS2 - but it is a bit hot for everyday naps at home).

Do you think this is alright? Do you sleep on a different level of the house to your child?

The window of the downstairs room is near our bedroom window so I would hear DS2 as well as have the monitor on.

Sorry for the bit of the ramble, I'm just not sure what to do... I don't really want him on a different level, but I think that is what we will do. I guess I'm just looking for some reassurance that it's not the wrong thing to do...

We used to have a two storey house with us on the ground floor and then all other bedrooms upstairs. DD1 stayed downstairs, either in our room or in her cradle in the family room until she was about 4 months old and then she went into her room upstairs. DD2 was a bit more of a nightmare in terms of bad sleeping and constantly feeding so she was downstairs with us probably more like 7 months. By the time DD2 was 13 months the girls were sharing a room - their choice.

My kids ended up co-ordinating their day sleeps - more my self preservation I think because neither were good at going down for a nap so unless I put them both down together it just didn't work.

I don't think there is any right or wrong way to do it - you work with the space you have and whatever gives the best overall result. Probably nothing is going to be perfect. I personally didn't like the girls being upstairs at night when I was downstairs - they felt so far away, even though we had monitors etc. We had a seriously enormous house though, and TBH it was probably more my issue than a "real" issue IYKWIM.