Patrick of all these go to,s the 12" is the most transportable and easiest to set up.For the bigger ones(I have the 16") you really need to have it in a roll off roof obs or have it so you can wheel it out in an a flash to get the most out of it.And the trolleys you can buy really aren't heavy duty enough so you will probably have to fabricate one yourself.Also I can see myself replacing the chipboard structure with ply at a later date.
Another way to get good value from these scopes is to hook a video camera up the views are very good indeed.
As for price justification one look at Omega Centauri or Tuc more than makes it worth it.
Cheers Derek
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