I guess it's different mind sets, I want a long term plan. One that includes the fact that at mid 40s, my super fit (competing at international level sports fit), is beginning to find muscle niggles that dont just go with one physio appointment and a good nights sleep - that can cope with one of us dying or getting seriously injured some how.
A mortgage can be insured. If you struggle to make the payments, it is a hell of a lot harder for a bank to repossess than a landlord to get you out. And frankly, not paying is the only way you'll lose your home, most people i know in rented property who have been given notice it's down to the landlord wanting/needing to sell, not because they did anything wrong.
I would look at ways to keep a rental property of some sort to keep you on the property ladder - frankly if in a few years time you realise the nomadic lifestyle wont work for your dcs secondary education, you will have had tenants paying your mortgage for you for the inbetween period, building equity for you.
Once you've stepped off the property owning ladder and spent your equity, it will be very hard to go back, and most retirement plans assume you will have property to fund it.