Hey no worries, I know this is going to be an expensive endeavour...
With that in mind, what would be the benefit of me attempting a self-build, apart from maybe 'discovering myself' like going on a spiritual walk into the wilderness? I see fairly decent builds to buy pre-assembled direct from Overclockers, PC Specialist, or CyberPower etc. Yep they maybe slightly more, but are the components that go into a CyberPower or PC Specialist build inferior or something?
Price tag over time depends lots on component choises, timing of buying new parts and especially on self built&updated vs pre-assembled/build.
By prioritizing quality and versatility in parts which don't get technically old can bring long term cost down.
For example my case is few months short of 11 year age.
Also quality PSUs come with 10 year warranty, best ones with 12 year warranty.
That long time "return on investment" won't ever happen if just keep buying pre-assembled PCs to stay at good performance level.
Usually gaming PC becomes performance wise obsolete before half of that.
Pre-built PCs often skimp in those parts which would hold their value best.
Like PSUs of most pre-builts are often at low end garbage-mediocre level.
And then there's that timing part.
Intel is surely in lead in single core/thread performance giving advantage in most current games.
Butmany Intels are overpriced already now compared to speed difference.
And compared to where game development goes in long term most of them have miserable for the price long term view in holding value.
In fact Zen2 Ryzens to be released in Computex are likely going to offer 9900K level performance at about half the price.
Also unlike Intel forcing people to buy new motherboards for same architecture CPUs just for the fun of screwing consumers to butt, current AMD motherboards will get BIOS update for supporting Zen2 CPUs and likely also next year's releases.
(because DDR5 likely won't appear on consumer markets much before second half of next year)
Also after multiple years of barely crawling forward advance and increasing prices graphics cards should see major advanced and competition in next year to two.
With highly parallel work load their performance is easily improved by new designs and manufacturing techs.
There's actually a 'paper' that's been written theorising that if you read the end of a book first you actually enjoy the full read more. I certainly enjoy some books/films on second read/view.
Don't forget Babylon 5.
It needs at least second watching to understand more than half of some episodes and how well story was written.
(except for fifth season being lack luster compared others because of threat of cancellation after fourth)