30 to 45 minutes, but if it can be done, cut down on the time it takes to tele-port between bases. The animation(if you can call it that) takes forever, and I doubt the game needs all that time to handle the transition.
30 to 45 minutes here, too. There's an certain amount of pressure and nervousness when the time limit is shorter. The grip on my Xaverus gets a little slippery.
The little animation while using the telepods is to slow down the overall process of traveling. Zipping between different Bases would be waaaay too fast without it (although I understand the desire). There's nothing glorious about the animation (it's ANSI, after all); it's just meant to heighten the tension and slow the players down.