hahahahaha - if you think anything in modular is a waste of money, I'd suggest walking away now
everyone I've come across who started like this (tiny case) has come to 'regret it' within 3-6 months - as they end up buying another case and then another and another
buy a decent sized case to start with (the ones you mentioned are very good) and you are less likely to get into the hobby of buying eurorack cases - I made the mistake of buying a 6u/72hp case to start with - and 5 year later have 1500hp... may have stopped at a mantis, if I'd bought that to start with
if you want to save money - build one - it's easy - a couple of bits of wood and a power supply, but not a uZeus as they need a heat sink... I like the befaco excalibus for DIY cases
here's the link to the actual rack (not a jpg which is next to useless)
dump the 2 functions and the shifty
add 2 * fx aid xl, stages and a basic starter set of utilities - links, kinks (discontinued - buy it if you can find it - substitute: wmd/ssf toolbox) and shades - consider a matrix mixer
download 'maths illustrated supplement', play until you start to reach for something you don't have and then add that - repeat until death
"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia
Utility modules are the dull polish that makes the shiny modules actually shine!!!
sound sources < sound modifiers < modulation sources < utilities