I know most of you guys are a lot more knowledgable about this than me so here goes. I am getting ready to paint the exterior of my house, hardi-plank trimmed in cedar, I have been looking at pittsburgh,coronado and richard's paint, have absolutely ruled out behr and valspar, the paints that I am looking at are 30 dollar a gallon paints and were recommended from the salesman at each paint store, now for my question is the duration paint from SW really a lifetime paint? if so I would gladly give the extra 20 dollars a gallon to not have to paint again, but I am not sure I believe this, all the others at the aforementioned paint stores told me I could realistically expect 10 to 12 years with their product before re-painting. I live in Fla, not on the coast, but it is still extremely hot and humid. Thank you in advance for taking the time to answer my questions.