Exposure Unit Question/Recommendations [New Shop, plz help]

Hey everyone,
Thank you for stopping by. My fiancé and I just opened a screen printing shop in Florida. We have essentially the whole screen printing process down, however we are running into issues with our ability to make stencils that are good quality.
My opinion is our exposure unit, and I need recommendations on what exposure units you are using in your shops. I would prefer vacuum, but I would also need to be affordable at best.
Also, if anyone has any recommendations on how to curb humidity that would be awesome too. Has anyone tried Chromalime, part of Chromaline's line of emulsion, as an emulsion? Does it work better in higher humidity climates? Or does anyone recommend a better brand for high humidity shops? Also, we use water-based ink if that changes anything. I know Chromaline is for plastisol inks, but I'm not having any issues with stencil breakdown by using the water based inks with it, so I don't mind breaking the plastisol vs water based ink emulsion "rule". I would like to avoid mixing any emulsions, I want a photopolymer that is already pre-mixed if possible.
Thank you so much for any help!!! Much love for the community. I have been on here thousands of times since we opened, you guys are the best!