You can drive a 30,000 lb bulldozer on a 4" slab, so a little wind is not going to hurt it. If you have interior point loads, just put footings under the slab in the interior. The loads in a 16x24 are negligible though. I'd also advise speaking with an engineer. It doesn't have to be expensive. With your wind loads you're going to need some serious wall and roof sheathing too.
This is an Alaskan slab with HTT4 holdowns installed after the pour. You can see the SIP on the other wall.
