4K TVs are not $2000, they’re incredibly cheap these days. You can get a 70-inch 4K TV at Costco or similar retailers for less than $500. And even less than that for more reasonable TV sizes.
I normally don’t like factoring in the cost of other hardware anyways because the computer will also need a monitor, mouse, keyboard, speakers, etc. which are things you don’t necessarily want to skimp on either.