my friend which had a farm with 300 gpu's had around 60 gpus to fail in the first 180 days and around 40 gpus more to fail in the next 180 days, around 100 gpus out of 300, 33% in a year.
Holy Sh*t. Do Something else. I mean really - that is the worst results I've ever heard of - Holy bad luck stories.
BTW - those results aren't happening to anyone else - just your "friend" - While this article is old, it shows the constant improvement in GPU life up to 2014. Go to Discord, Reddit or even here - no intelligent miner would tolerate 30% failure rates with non-warrenteed GPUs. What ever you and your friend are doing to buy GPUs - it's a dumb-ass move.
https://www.pugetsystems.com/labs/articles/Video-Card-Failure-Rates-by-Generation-563/30% failure rate points to buying shitty GPUs from an unreliable provider. Who would do that? What are you doing, ordering no name GPUs from China to save a dollar? Your "Pro-Miner" friend isn't much of business man if he keeps buying the same crap over and over. Speaking of China, your story has more red flags in it than the Beijing Olympics.
Of the few (30+) GPUs I've bought, 2 where DOA and EVGA replaced them both without question - great customer service. Most resellers have 1 to 3 year warranties.
https://www.evga.com/warranty/graphics-cards/ So again - you are tolling information that is just wrong. And I truley mean this - I am sorry for your loss, but you should do something else than mining. You are not up to the task.
Bottom line: Miners are still making money. And GPUs are going to be here for the foreseeable future.