I made level 60 in meh 1st 100 days :) - Try making a huge resource farm by mining all the bushes and rubber ( 3k of each ) then work it till you have like 60k each resource. Then Mine 3 tall the entire desert mine underground ( 30k blocks ).
I think it may be possible to buy, and act like mannequins. But the only limitations is that you can't put something offensive in it as a way to bypass the filter system, and well. There may be some so I'll leave some reasons for someone else. Also cool idea.