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)