This is great - always interesting to hear somebody talking from experience about a subject they enjoy. I appreciate the effort you've put into video production as well (nice white background, framed well with just your hands in shot and tools in nice focus) - it makes things very clear.
Good information on tools, looking aside to my workbench during this video confirms the tools you ddescribe are the most essential and used ones. To this I wood add a piece of plywood on top of your work surface to solder, cut and drill on. A variety of square metal and or wooden pieces to hold things square, some metal clamps, I found some ginat crocodile clips which are very usefull. Also wooden clothes pegs with the spring inverted on them are a good help to clamp parts together. And finaly a selection of different kinds of brushes, like an old tooth brush, some paint brushes and a small wire brush to clean parts from filings and other debries, and to clean your model with water and soap after a soldering session.
Someone already asked what range of solders you need for etched + whitemetal loco kits but they didn't catch your eye. I would like to know please and what flux you use please.