So when you upgrade to some 500k house with what, maybe 3500 square feet and several extra BRs and bathrooms, what to do you with all that when the kids are out of the house? Play tag with your wife? Indoor corn hole?
More taxes, more upkeep, and way more space than you would ever possibly need for just the two of you. Probably need a maid service once a week which adds another year or two before retirement. Probably a bigger yard and more landscaping costs to keep up with the joneses, adds another 2-3 years before retirement. Higher utility costs to heat/cool that space, add another year.
Damn dentist, you aint gonna retire till 70, especially because once this house is paid off your wife will want another upgrade