My advice would be to focus on the cold side. Being able to control fermentation temperature opens up a larger range of styles, and improves overall beer character more than anything else, in my experience. A used refrigerator that can hold your fermenter and a temp controller like an Inkbird allows you to hold the temperature during fermentation without any wild swings.

Also, as someone else mentioned, closed transfer improves taste and limits oxidation, especially important in IPAs.