Depends on your DIY skills, how much time you have, what you want the end product to look like, and whether or not the difference in price is worth it.
BTW, A quick Google search shows me that a pair of those used should be nowhere near $8K.
I’ve heard some pretty good DIY speakers.
Most of them look like $hit, though. I’ve only ever seen one pair that was DIY that would pass the WAF, and that guy was a master cabinet maker.....so....take that for what it's worth.