We can debate the financial pros and cons of buying versus renting until the cows come home but it's important to separate two issues here: the satisfaction of owning one's own home, and the financial risks and benefits of investing in real estate.
A lot of the satisfaction involved in owning a home have to do with the "nesting" instinct, crafting a cosy and customized home for you and your family, and building links and routines with the community of your choice. Unfortunately, your chosen career makes this quite a challenge. If you do buy a home, have you considered the emotional wrench of having to give up your "nest" at a time and for a place not of your choosing? If you rent, you won't have the satisfaction of ownership, but you will avoid some of the emotional grieving too.
Investment in real estate is a logical part of any diversified portfolio. Given your mobility, perhaps the best approach might be to calculate the difference between rental and buying costs, and to DCA that amount in REITs. When you retire, that could be your "house fund". ER will be your best opportunity to buy a home where you choose, for the long term.