wut?...you plan on being divorced by then?
take it from a man of experience, if both you and your wife are retired, you actually want a big house....one big enough to allow you to hide and dodge. In fact, a big house with several outbuildings is best....a couple of workshops; an extra garage; an exercise room; a tractor shed; a wood shed; an RV port. Cover your property with buildings, walls, and doors with locks. Ratchet up that square footage for peace of mind.
when dealing with women, a gender genetically disposed to be relentless in building a "better" mate, the path of least resistance is the best policy. But that policy is impossible in less than 2000 square feet