Inflation is an issue all across the world, and the conversations we can have have about it don't care about petty politics in individual countries. Certainly, some countries are worse than others, but that's not really of interest to an international forum.
I've tried to redesign my fishroom to deal with rising energy costs and rising general equipment costs, and I think that for anyone who isn't rich, that's a sensible direction to take.
I've moved to central air delivered via homemade piping systems and with valves. I've largely eliminated the use of heaters by choosing fish carefully, and insulating a room very well. I bartered my skills for a pile of LED lights to replace all my older systems, and that saved a lot of money. I bought a pile of Chinese HOBs I liked (no names from a local store) and managed to run them for up to 12 years each, with a little switching out of parts. Eventually, you run out, and I've found a reasonably priced source of air driven sponge filters I like to replace them.
Are the sponge filters as good? I'd argue no. But they are good.
This weekend when the package arrives, I'm going to try attaching stainless washers to the not very good suction cups, and holding them in place with strong magnets through the glass. I have a pump that works that way, so we'll see if this hack does it longterm.
You try things, but if you are retired and on a set budget, you may just try them sooner!
Technology in the hobby is interesting. Much of it is unnecessary, as brilliant as it may be. It's convenient, but not necessary. I'll leave the super gadget tanks to the engineers drawn to the reef hobby.
I don't need power hungry filtration (though I use some and will til its wheels fall off). I've looked at what the older generations of fishkeepers did. If you pair that with our increased knowledge of the science of water and of the evolution of fish, and with improvements in lighting technology, you can reduce costs longterm. You need more water changes, something older aquarists didn't understand, but low tech approaches can save you a lot of money.