I bought a sawmill last year. Primary use is cutting pine for my wife's art business; we've reduced her trips to Home Depot for pine boards to near zero, so it's helped her bottom line. I recently cut some cedar posts and planks for my sister-in-law's front porch makeover. I built a roof extension to my shed to cover the sawmill. I'm cutting and stacking planks for a pole barn build.
It's an up front investment, not just the sawmill, but the tools to fell and move trees efficiently. Also takes some time to learn the milling process. There's also cleanup. You have to burn, chip or otherwise dispose of the scrap. Makes great mulch, but again, more time and money invested.
Enjoyable to some (including me), but I advise anyone thinking about going down this road be sure to allow additional funds for support equipment, and that the investment in labor isn't going to be a problem, both in terms of physical well being and mental attitude.
