Not to take away from your incredibly impressive turnaround but I think you missed the point here.There was no choice but to wait as we didn't have the cash to purchase without mortgage which was the goal but your right in the 3-4 years prior to us getting the house it went up 200k
Unless there were other reasons (e.g. credit report) that prevented you from getting a mortgage, then you would be in an overall better position had you bought (with a mortgage) 5/6 years ago.
I can understand your overall fear of returning to debt considering where you were ~15 years ago but equally not all debt is bad. It has cost you a significant amount of real value to wait and achieve the "buy with zero mortgage" approach.