You got some good advice. One thing I would like to say...I have taught preschool, I had 3 kids in 5 years, I have dealt with babies and toddlers. THEY ARE NEVER SAFE UNSUPERVISED. What you may think is a toddler proof room, would still pose hazards for some kids. Having said that, if my kids were up/awake, then I was up in any given situation. They came and woke me up and we got up together. Sometimes they would pile in bed with me for 30 minutes for cuddles and snoozing.
The half door is a good idea as long as you are not using his room as a giant play pen--no way to get out without your unlocking the door. If the door is just used as an incentive to get him to stay in bed and you can still see each other that is good.
I did require mine to stay in bed at bed and naptime whether they went right to sleep or not. Screaming was not allowed. A pop on the bottom stopped it. They could lay in bed and look at books until they were sleepy or an hour of nap time was passed. Usually they fell asleep quickly after they learned that they had to stay in the bed. ;-)
What I did was put them to bed at 8 and get up with them at 6. Mine was up at 6 every day! LOL But that was plenty of sleep for him at that age. He also napped from 1-2:30 or so.
One point I don't see mentioned. When you go back to work, what time are you getting up to get you both out the door dressed and fed? When I worked I got up around 5:30-6:00 to get myself and a 3 yr, 7 yr and 8 yr olds out the door by 7-7:20 every day. You may find that next month when you have to go back to work it is nice to have the extra time so that mornings can be pleasant rather than rushed. ;-)
Good luck,
ts