Cost will be a big thing. Today I can build a 16 RX 570/580 card rig with open air frame for $3500-$4000. IDK that you could build it, market it and still have margins in it.
Could you link a page you can buy 16 RX570 or RX580 for less than 3500-4000$ ?

I would buy 10 of those rigs from you right now for 3500$ - 4000$ / each
Can you provide us some details about those 16x RX 570-580 builds for 3500-4000$ please

I said build not buy. The RX 570/580 can be found in the USA specialty stores for ~ $220-$230. If to buy in bulk you can easily get them for that price if not less by buying at least 5000 units.
$150 server PSU + Pico PSU. $25 plastic open mount rack and zip ties at Lowe's. $100 cheap Chinese mining board with riser CPU. $150 for RAM, CPU and SSD.
OK! Can you post some links where you can get rx570 and rx580 cards for 220-230$ in the usa with free shipping

I actually just saw a gap in the ranks as far as prebuilt systems. 6-8 GPU solutions are being offered, but there's room in a typical 4U case for as many as 16 if you play your cards right.