[emilyfm]

Plan A would be to send some robots to try building using this technique.

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.

[jsymolon]

Wall-e unit for compressing blocks and leaving a heap.