A lot of kids only need 1 1/2 hours but we like them to have 2 for our sake. I would be putting him down last so that would buy me 15 extra minutes.

If you have options and want to take them then that is one way to go. On the other hand if you need to find a way to make it work for the income then either keep child in his highchair for half an hour after putting others down while you clean up so he goes to bed later and gets up same time as others or get him up when he wakes and put him in his highchair then while you get snack ready, start supper, whatever you need to do just before wakeup time.

My own kids never napped but they were allowed to sleep till normal in the morning and didn't have to get up and go to daycare and were in bed at a descent hour because I wasn't trying to make up for not seeing them all day.

If he arrives as the last one then he is probably getting extra sleep overnight compared to the others so doesn't need a lot of daytime sleep other than to refresh - hence the one hour.