What are the pitfalls of assembling a home system unit (4k+ videos of new games at minimum wages) for a phased budget update?

Question

Computers

Honored Russian techies.
Who has experience or theories about long-term renewal?
Who knows how with a budget of 15-20t.r. assemble a system unit
for a subsequent long-term very reasonable update.
There is a case and a screw and a vidyuha pci v2 - a plug 1gb gddr.
I plan to separately buy dropsy-5t.r. and bp with an active stabilization system -5 thousand rubles.
I think it's better to buy a top mother and plugs a stone and gpu and in a few years before the top cpu + gpu
Or just buy a serious stone and gpu but a budget mother and then buy a pre top mother?
I think it's just to watch movies in the highest quality and just try multiplayer games and cosmic and economic strategies. For the rest, my junk is enough for me.
direct12 , pci v3, ddr4 are required
.
The price of red CPUs pleases.
And with vidyuhoy there is no experience with the reds! 970 green is not outdated, right? Do you need a vidyuhu for games from 6GB gddr?
Very disappointed in the obsolescence of shaders and directx! (Is it possible to update every high-end year vidyuhu? especially if it is nested on the mother pci v4)
What other ways are there for a long-term update so that movies in 4k and new games go at minimum?

Answer 1

Most likely, there will be no budget update, unless there are used parts stores in the district, and the update does not drag out for 7 years: recently I upgraded a processor from a Celeron g from such a store, I don’t remember which fourth-generation Core i5 for about 4000 rubles. Now I would think in the direction of Ryzen, but I don’t know how long they will produce processors on one socket.