SIPS vs plywood

[SBH]

I will be purchasing a 24' yurt soon and can not decide if I should buy a SIPs floor or build a plywood one. I dont' have a lot of building/construction knowledge, so on one hand the SIPS would be easier, but it seems much more expensive. The yurt will be in Oregon with fairly mild climate - a small amount of snow in winter and decently hot but dry days in the summer. Is the SIPS worth the extra money? and can any one give me an estimate of what a a plywood platform would cost if is was just plywood and some kind of

insulation

(not the cost of labor, as I have friends who can help me out with building it)?