bottling tank

Building a bottling bucket with my daughter Kathleen. Video is 3 minutes. https://youtu.be/mW6QZjHPxUI

So apparently I am going to be getting funds for an extractor/bottling system for my birthday! I just don't know which one. I've never seen an extractor in action. Does anyone have any suggestions? I've looked about online, but since I've never used one I'm not sure what I'm looking for. I'm not...

I'm hankering for the better flow (which will permit better valves) of a bottling tank, but can't justify dropping the $1000+ for one. I have several legitimately acquired stainless beer kegs of different sizes, and access to a local skilled welder who can do SS no problem (I know it's not...