J.J.
I have the same problem. When my son was first born we kept him in the pack and play in our room. Then at 2 months he went upstairs to his own room with a monitor. He started sleeping through the night about a week after that so I never had to sleep upstairs. It was only a week of going up there to tend to him. We will be transitioning to a toddler bed this year and plan on adding a babyproof lock to his door on the outside. Our stairs are already securely gated, but this will be extra protection to keep him in his room. We are also in the process of bolting ALL furniture to the walls so there is no chance he can pull his dresser on him or anything like that. Just keep the monitor on so you can hear if they get into trouble and make sure the room is childproofed and let him be.