If this means that S/O's return for cyclics (initially) plus one trip back home you may well- NOT qualify for foreign taxation. The S/O's who were planning on more than one personal trip home per year may find this hard to swallow
Have to disagree. Cyclic training would be considered as 'short business trips' and would not jeapordise your tax residency status. Come back as often as you like - just don't create the impression that you are commuting.