Provided you're not adverse to carrying 35kgs at a time Frank, you should be fine moving an AP1200 around... Portable pier is the way to go for sure..
Make sure to look at other options for scopes too... Some people have had problems with them in the past, but the ASA N series newtonians could be very nice too... Providing they have the issues under control, they would be far more optically sound than an SCT in secondary focus... Less obstruction, more uniform diffraction, an N12 probably weighs about the same as the C14 + HS3 and probably costs about the same (If you plan on buying a Celestron OTA brand new in Australia...)
Just remember to keep your eyes open to other possibilities along the way... You're going to have a lot of mount head room to play with!
Not trying to put you off the Hyperstar option by the way.. Ever since I saw results from those things I've regretted selling my C11... F/1.8 and 11" of aperture is, well... mind boggling to say the least... You are trapped as far as camera options are concerned however... Within reason anyway.