Hi Paul,
Welcome to the forum. Huskyman is right about Kevin, he is the resident expert and has been a good source of help and info.
I have been milling for about a year and am very pleased with the results. I have been able to produce dimensional softwood lumber as well as a thousand BF of 1 by stock.
I bought the 24" alsakan III, would probably get a 36" if I had to do it over, just to have the extra capacity. I also bought the Mini-Mill which is indispensable in quickly squaring up a cant.
The whole process is hard work and is dusty, loud and hot during the summer, but the end product is amazing if you pay attention to the set up details. I use a Husky 3120xp for the main milling and a 288xp lite for the mini mill. Milling is hard work on a saw so a quality powerhead is essential.
I'm not sure what your specific safety concerns are, but it is as safe as using any large chainsaw as long as you pay attention to what you are doing.
The best part of chainsaw milling is that the system is VERY portable and fairly affordable compared to the less portable and more expensive bandmills. Hope this helps.