One problem that I saw with Lee 20 lb pot and the commercial ladles was that it seemed that it would get more difficult to fill the ladle as the level of the lead dropped due to the commercial ladles having a straight handle and the Lee pot being not particularly wide. Plus, I was concerned with most ladles pouring from the top surface f the lead, so they would also be pouring whatever was on the top of the pot. The Rowell ladle poured from the bottom, so I was considering them, but they still had the straight handle issue. Considering the fact that you need to tilt their ladle to pour, if you curved the handle more upwards, it might make for awkward pouring though. So, I thought that a bottom pour ladle with a more vertical handle might be better. I thought about a design where there was a spring loaded pin to plug the bottom pour orifice which you operated with your thumb while holding the ladle, but that seemed a bit complicated and I wasn't sure that I would even *like* ladle pouring, so I decided to just test it out with a hole drilled in a stainless steel condiment ladle. Originally, I went with a 1/16" hole and the speed of the lead stream was too slow, so I upped it to the next size (3/32", I believe) and I flowed a lot better. You end up with a bit larger sprue than with a bottom pour pot, but that extra sprue just helps keep the mold up to temperature. As it turned out, I liked it well enough that I didn't bother continuing on with the design with a spring loaded pin plugging the orifice. The cost of these types of ladles are around $1.00-1.50 at a local restaurant supply store. Just choose a size that fits in your pot and is large enough for all the bullets in your multi-cavity mold plus a bit extra for the lead that flows before you get it to the mold, on the sprue, plus you want some lead leftover since you don't want whatever might be on the surface to go into the mold. It sounds more complex that it is in practice though.
One thing that might be an issue for some people is that the height of the melting pot related to your body needs to be different with the ladle vs bottom pour pot. With a bottom pour pot, I find it more useful if the pot is higher up towards my head since I want to see the lead going into the mold cavity. With a ladle, I am working at the top of the pot, so I need the pot to be lower relative to me. In practice, what this means is that I sit while casting from the bottom pour pot and I stand while casting from the bottom pour ladle. Since my old joints hurt from doing anything for too long, it's nice to be able to switch up from being seated to being standing. If you want to use the bottom pour ladle while seated, from an ergonomic perspective, you're probably going to need to lower your casting pot to the point where the top of the pot is about the height of your elbows. Maybe making a platform out of a couple of cinder blocks would be the right size. You could put it in front of your chair and basically have one leg on each side of the pot. Either that just sit on something taller like a bar stool.
All operations with the bottom pour ladle are done over the pot, so there tends to not be any mess of molten lead ending up on other things.
Also, if *somehow* this type of bottom pour ladle ever gets so clogged up that just dunking it in the molten lead doesn't fix it, it would be extremely easy to clean out.