Is the factor just a 1000x? That would actually be an argument in favor of asteroids.

All you need for space habs for construction (well, maybe not all the organic matter) is in asteroids. Maybe all we need material-wise is probably in the larger asteroids that we are trying to track for collision detection.

Here, let's cut the difference: MOONs! Why bother with planets if their moons have all the resources and none of the lifting issues.

I guess our moon is pretty resource poor since it formed from Earth's crust. But then again, have we surveyed what's under the surface?