I'm actually celebrating this week that my daughter STTN for the first time since she was born (and I STTN - minus 1 bathroom trip - for the first time since I got pregnant with her...wuwu)
I would have to say, more than ANYTHING that you need to do what works for your family including dad and baby. Listen to your babe and watch their signals and I think you'll figure it out when they're going to be comfortable having their own space.
We've been toying with a toddler bed in different spots since DD was about 14 mos (in our room at the foot of our bed, in her room, in our room as just a mattress, etc) It wasnt working so we abandoned it for a few months, and about 2 weeks ago we brought her mattress back into our room and I've been putting her there for naps (this also doubles as our den where our TV/computers are so I'm nearby all the time) We've been starting her there, if she's not fussy, and then moving her to our bed whenever she wakes up.
The past few nights I've noticed that she sleeps a LOT better on her bed (for more hours I mean) than she does in our bed. Then 2 nights ago, she slept all night long. Its a long process, and I dont make her stay there if she doesnt want to, but I definitely think she's ready for it now. I get her bottle ready at bedtime and she crawls into her bed and lays down now, without a word or a direction from me.