It's not going to be cheaper to make chocolate unless you already have everything you need (basic stuff like a double boiler, candy thermometer, and molds) unless you plan on making higher quality chocolate which could possibly be cheaper than the equivalent store bought product.
I've made white chocolate (and some dark) before, but the raw ingredients (cacao powder, cocoa butter, sugar, vanilla, and in my case soy milk powder for vegan chocolate) ended up being more expensive buying bars of chocolate would have been.
On the other hand, I did enjoy making the chocolate and it turned out well on the second try... learned I had to really control the temperature precisely from the first batch/attempt. I need to get more supplies and try making more and different types, though.