External multi drive nVME / NVME Nas solutions

[Snowleopard]

I am looking for a new NAS, I was looking at QNAP and Synology NAS's, but Storage is changing and I am looking at devices that are straight up nvme drives and no mechanical hard drives.

First I found this, but the price seems really high for a 2 drive solution:

 

https://www.amazon.com/StarTech-com-Thunderbolt-DisplayPort-Downstream-M2E4BTB3/dp/B09YVLFWVJ/ref=pd_ybh_a_sccl_10/140-0010366-2360043?pd_rd_w=Vq1O8&content-id=amzn1.sym.67f8cf21-ade4-4299-b433-69e404eeecf1&pf_rd_p=67f8cf21-ade4-4299-b433-69e404eeecf1&pf_rd_r=J34WG1MY1K8PF0JR2MP9&pd_rd_wg=a8HXW&pd_rd_r=ad2c930b-1d57-40b4-bda6-5c90d1ed8bda&pd_rd_i=B09YVLFWVJ&psc=1

 

Then I found some videos about these things:

 

https://www.amazon.com/Asustor-Flashstor-FS6706T-Computer-Attached/dp/B0BZCM22WD/ref=pd_ybh_a_sccl_2/140-0010366-2360043?pd_rd_w=Vq1O8&content-id=amzn1.sym.67f8cf21-ade4-4299-b433-69e404eeecf1&pf_rd_p=67f8cf21-ade4-4299-b433-69e404eeecf1&pf_rd_r=J34WG1MY1K8PF0JR2MP9&pd_rd_wg=a8HXW&pd_rd_r=ad2c930b-1d57-40b4-bda6-5c90d1ed8bda&pd_rd_i=B0CHMHHCC1&th=1

 

These offer 6 or 12 NVME slots depending on the model, but wow, the prices are crazy without any drives.....

What are other solutions? Could I get a small case with an ITX motherboard, be able to support up to 64gb of DDR5 in 2 slots, have more PCIe lanes with an AMD processor and use some ICY Dock 3.5 inch bay adapters to stuff 4 or 6 NVME drives in each slot and run Ture NAS or something similar?