I've been enjoying the Jane Iredale PurePressed mineral foundation powder: https://janeiredale.com/us/en/.....neral-foun. It has SPF 20, so it gives some extra sun protection (I wear it on top of an SPF 30 moisturizer). I do one layer of the foundation, then spritz with the Jane Iredale Pommist, then do another layer and spritz again.
If you don't have a lot of product sensitivities like I do, you could probably find something comparable to this product for less cost. I think too that you could easily spray down the layers with plain water to set them; I don't know that you have to use a fancy spray. I really like this foundation, because it feels weightless and doesn't cause me problems in the high humidity.