Yeah the time thing...
That's a big one.
Also, before you get another, get your beardie tested for Adeno, just to be safe.
I have a male, Sinclair, who I got when he was just a wee little mite and is now getting near 2 years old.
When he was about 10 months, I got Pele. She was a rescue- sorta... I mean the woman had incorrect info, but was fundamentally a responsible pet owner. Her child grew out of the lizard basically. So Pele was basically a sweetie, but just really wasn't accustomed to handling. She's still no where near as laid back as Sinclair and I've spent some serious time with her.
The other thing to consider with a rescue is how much money you want to spend at the vet. When I take in animals that's always a concern, especially because I already have animals. What am I bringing in other than just the reptile? And if you are buying an enclosure as well- get the details on it so that you can be prepared with what you actually need. They rarely align.
If you decide to get a baby, check out the breeders on this forum. We all know them and have relationships with them. They've got beautiful, healthy babies!