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)