Upsides To Making A Portal To Heaven  
    To  Build   The   Factory   There   
  
                                          
 First  Of  All, Real Estate:  The Highly 
 Fractalized  Geometry  (Not  Proven  But 
 Likely To  Be  The  Case) Implies Almost 
 Unlimited Room; Even If  The Portal Tech 
 Would  Be  Stolen,  Chances  Of  Running 
 Into  A  Competitor Is  Close  To  None, 
                                          
 Secondly,  The  Resources:  Heavens  Own 
 Alchemical  Properties   (Proof  Exist!) 
 Makes  Most  Base Materials  Easily  And 
 Readily  Available.  Once The  Molecular 
 Movement  Patterns  Are Mapped Out,  Any 
 Compound   Can   Be   Created  Virtually 
 Without                            Cost. 
                                          
                                          
  
  Downsides  To  Making  A Portal  To   
   Heaven  To  Build The Factory There  
  
                                          
 Current  Portal Tech  Takes  Some Energy 
 To Hold  Open,  Which Isn'T A Problem In 
 Itself.  Test Results  However Has Shown 
 That Without  An Active Tether, Heaven'S 
 Time  Flow Breaks  Down Completely. Even 
 A Momentary  Fluctuation Of  The  Portal 
 Would   Render    All    Remote   Assets 
 Practically  Lost.  Much  Care  Must  Be 
 Taken  To   Maintain  Portal  Stability. 
 (One Option Could  Be  Several  Portals)