While Hao Ren hated to admit it, Lily the dumb husky could actually come up with some rather sensible suggestions. Lily was right. The arks do not need a permanent place to call home. To the people in it, the concept of 'homeworld' had long vanished, and even a generation or two would not revive such a notion within their minds. So regardless if you were to give them a planet, or how long you would allow them to live on one is immaterial. Now what the arks sorely need is a place to call port, and a chance to repair those ancient, decrepit and now soon to fall apart systems. Even ten years would be too optimistic a timeframe to complete the repairs.
Hao Ren ran through his progress within the Plane of Dreams, and figured that he would probably run into a suitable planet soon enough. At that time, he will just have Lawrence and his kin to move again.