Will keeping a GFCI tripped increase its lifespan?
Is there any benefit to tripping a GFCI receptacle when it&#39;s not in use?

Does big current draw make GFCI outlets go bad?

I'd say you're over-optimizing. You only need 1 GFCI outlet on a circuit, and it'll last about 10 years. That's around $2/year. That's if GFCI outlets degrade from simply being attached to power; the second linked question indicates that heavy loads and similar usage causes the wear and tear.