If you had the technology, how much would an economically feasible, biosphere grade, sustainable habitat, environmentally acumen planet 'cost'?
Doing a project comparison, these options are used to narrow the technology and maintenance to only two outcomes:
1) The Genesis Device- http://m.startrek.com/database_article/project-genesis
2) Project Prometheus- http://www.weylandindustries.com/investor
There are other projects being considered, but these two appear to be most popular. Topics such as overall cost, return on investment, long term maintenance are optional. The original question of "how much would a good planet cost" has already been answered by the forum. Thanks.