If you're planning to do multiple calibers, the NOE sizing system will be cheaper in the long run. You buy one die body and add the size bushings you need.
Advice from a new caster who is also rather hard-headed and not the most willing student.....At minimum add a $20 hot plate and a $25-50 immersion thermometer to your setup. Prior to having an immersion thermometer I was relying on an infrared thermometer, which had difficulty reading the molten lead's temp.... Come to find out I was running my pot a couple hundred degrees too hot.I was running my pot way too hot and my molds too cool. Amazingly the results weren't too bad, just a bit unpredictable at times.Now I find myself melting the same lead over and over much less frequently.
I have 2 lee 10 pound bottom pour pots. I run my dial at 7 when I'm heating up a full pot, but I cut it back between 4-5 for casting. I've never used a thermometer, but I can see where it might be useful to a new caster. I preheat my molds on a hot plate. If you know you have clean ingots, sawdust or borax in the casting pot isn't necessary. I use candle wax or beeswax instead. It will usually flare up but once it dies out it forms a film over the lead and keeps it from oxidizing while you cast.