Any Cheap Mac SSD Thunderbolt 3 Drive Enclosures?
There's a handful of widely available NVMe PCIe SSD Thunderbolt 3 enclosures available. With portable 40Gbps Thunderbolt enclosure prices hovering in the $110-$130 range, a DIY Thunderbolt 3 enclosure w/SSD costs more than complete off-the-shelf half-terabyte external TB3 backup drives like the 512GB Patriot Evlvr or the 512GB VisionTek do!
By the time you add a DIY M.2 PCIe SSD module - even one of the cheapest NVMe SSD's out there -- to an enclosure, your total cost inches closer to the $200 range. Just doesn't make much economic sense to cobble your own solid-state Mac backup drive until Thunderbolt 3 enclosure prices drop further.