There's a difference between being a poorfag trying to play an expensive hobby they can't afford, and being a budget conscious hobbyist. The latter is:
* Finding quality tools & brushes at good pricing not just buying GW everything. Not buying extraneous paint.
* Planning out a themed, single faction army to 2k points then buying them piece by piece until they have painted everything, then sticking to said army for a long length of time before starting a new project.
* Stopping said planned army once it reaches 2k points. Most players could probably count on their hand the amount of times they've ever needed more than 2000 points of a single specific army. Note this doesn't stop you playing that faction, you will want to do said second army in a different theme. So you might do a Guard Artillery Regiment army using Cadians, then the second army you might do as a Catachan Mechanised.
* Considering battlefield quality vs points cost. Eg, a 2k guard army having a Shadowsword instead of multiple lascannon weapon teams, sentinels and leman russ annihilators.
* Not buying new models when they have a backlog.
* Learning how to make terrain using basic materials instead of purchasing expensive pre-made.
* Also not doing stupid shit like wanting a cityfight battlefield and instead designing a basic easily made and highly compatible with the rules set of battlefield obstacle terrain (tank traps, sandbag walls & large emplacements, barbed wire and LOS blocking walls instead of large bunkers that are hard to fit models in). Find that semi-autist english terrain tutor guy on youtube and learn how to make them yourself.
* Base your models and your terrain in green flock. It is cheap to buy in large quantities, it doesn't require additional painting and you can make it yourself as well (mix paint with sawdust, bam, there are youtube tutorials on this). It is the most patrician base available, and it won't cost you $50 in GW technical base paints.