Thanks B-A. The Makita RT0700/Katsu are cracking little routers with about the same amount of power as the first pale blue Elu MOF96 I bought in the 1970s (600 watts). They are powerful enough to undertake many smaller tasks and are cheap as chips, especially if you buy directly from the importer, AIM Tools in London. The fixed base router is currently about
£39 , and the plunge base adds
£26 to that for a total of £65. This is well within the OPs budget. Whilst a small router like that won't make heavy cuts, such as a lock mortise, it will do a lot of useful work like edge profiling, cutting ironmongery recesses, trimming lippings, etc. I no longer use the corded versions for work, having moved onto cordless about 4 years ago, but I am still using the same type of router - here is a Makita DRT50 cordless trim router motor mounted in a Katsu plunge base with a home-made lipping sub-base fitted:
View attachment 293469
Unfortunately, sense isn't that common, so instruction is often needed to instill the basics (be that reading a book or whatever). The things you mention, such as spinning the router in mid air, over plunging, plus inserting the cutter so far into the collet that it isn't gripped properly, not pushing the cutter far enough into the collet so that it comes loose, bends and wrecks the router sub base, wrong side cutting, etc are all things I've seen so-called experienced people do over the years - often combined with the "I've always done it this way, and never (yet) had an accident"... So I'd trust training over common sense any day