Adam_MA

While Most folks will agree that mid-summer is the best time to repot tropicals, I have had success at about every time of year. My circumstances allow for this better because I have an indoor greenhouse with good lighting temp and humidity control.
I will assume from your statement that these trees will be living their lives inside full time. If that is the case it shouldn't make much of a difference what time of year your repot them. Of course you will want to be sure your tree is healthy and strong before you repot (unless it's an emergency repot) and be able to give it the conditions it needs to recover after.

Hope this helps
Adam