This seems like one of those things that you'd really want as a plan A but absolutely require sensible plan B as a backup.
If it doesn't work, you're only out a few robots (who may be able to be repurposed).
If it does work, leave them to it building a habitat which can be fitted out by further waves of robots later. By time that's all done the hard part of sending humans there will be more possible, and they'll have a base ready to move into.