If you've got the time, keep using what you're using if it's working for you. Don't use your casting pot for melting down wheel weights if you can avoid it. There's just too much dirt and other garbage that'll accumulate on the bottom and walls of the pot. You can do it but I wouldn't recommend it. Stick with your frying pan and the side burner of the BBQ. Just watch the weight you're putting on it. Wouldn't want to hear about a life altering accident with a pile of molten lead.
As far as a casting pot goes, a lot of people, including myself have had problems with the Lee bottom pour pots. After a while, the spout gets junk built up in it and it starts to drip. They didn't earn the name "Lee Leak-o-matic" for nothing. With mine, the heating element burnt out on the third casting session......and yes, I bought it new. Not wanting to be bothered with waiting for a warranty claim, I took it apart and put the body of the pot on a propane burner. After a few more casting sessions, sure enough, it started to drip and nothing I did seemed to help. It just kept getting worse and worse.
My solution to this was to buy a small RCBS electric pot and I started casting with a ladle. It's not quite as fast, but it doesn't cut your production in half by any means.
My final solution to my casting requirements was an RCBS ProMelt bottom pour furnace......and I just love the thing. It truly is the cats meow of home bullet casting. Now, nobody is expecting you to go out and dump $500 on a furnace right off the top. I just wanted to let you know about my experience with a Lee bottom pour pot.