The systems are so inexpensive now that two systems aren't prohibitive.... and you'll never leave one at home just because it was too much triuble to switch... that the weather at home keeps you off the roof.... even thoough you know the weather where you are going is great for PV Solar use.
Look at bestconverter.com to get an idea about prices for the trimetric (BTW, they are fantastic)
The controller is too hard to put in correctly to rotate so the only thing you'd end up rotating would be the PVSolar panel.
Enjoy both systems