Two things:
- The colour of that trailer would clash terribly with my car so my wife would not allow it. Make sure SWMBO likes it before jumping in
VERY IMPORTANT!!
- Forget about the mobile observatory, you will need a large trailer for that and then the pier and levellers and, and, and...... Use the trailer to transport your gear, that is VERY well padded, to a site then out comes the scope and the tent/observatory, etc. A smaller trailer would travel better behind a Magna anyway and the trip has to be bearable or the session will be wrecked by the travel.
Maybe I could paint that trailer......