[Locked to Avengers+ (Former and current members, since he doesn't know all the names.)]
There is a facility holding mutant test subjects outside New York. [Coordinates.] The staff are most likely scrambling to deal with an incident about a mile away. If you get there quickly, you should be able to get everyone out with a minimum of bloodshed.
The manor isn't far from there. Any survivors could potentially stay with Charles Xavier in the short term, if he agrees, and assuming all goes well.