I am having serious nap time problems and I need help.

I have a 13 month old little boy who won't sleep in the morning. Well, I don't think he's sleeping, and if he is, it's not for very long. I've thought about cutting his morning nap out completely, but he's tired usually around 10, but I can hear him moving around and I'm not sure he's sleeping. I can't go in and check because if he isn't sleeping and I go in there, he flips out.
I also have a son who is 10 months old and he still takes a 2 hour nap in the morning, and I have another little girl coming who will be taking morning naps. Right now I schedule is 10-11:30 naps, 2:30-4:30 naps. If I cut out the morning nap, he'll have to go down at 1:30 because I've noticed that this is the time he starts to melt down. But, if I put him down at 1:30, he'll be up for 3:30, which means I'll only get MAYBE an hour break in the afternoon. I don't know if I can handle that, especially because this little boys is ALOT of work. He's whiny and cries over EVERYTHING. I've decided to let him go once I fill up the daycare, but that could be months from now.

I don't know what to do! My son isn't ready to give up his morning naps, and I don't know that this little boy is either, but he never seems to be able to make it to his afternoon nap, which makes me think he's not sleeping in the morning.

Any suggestions?