Based on my research about real life use (reported speeds via router reviews) it seems like we can expect speeds ranging from 50mbs to 300+ mbps. So I'd say yes, wireless can replace wired. I'd be surprised if a single user was using more then 50 mbps even "heavy" applications only run about 5mbps.
In addition, with range extenders we should be able to form a reliable wifi network coverage. The reported range of the ac routers I’ve been researching (high end) have been up to half an acre.
The advantage to the new AC wireless standard is that all devices will be connected at their max level(depending on location) thru to a max possible speed in excess of 300 mbs. Traditional Routers send to only one device at a time, where AC routers with MU-MIMO can send to multiple devices at once, making sure that all devices are connected at their max speeds and reducing the likelihood of disconnects.
Best to move slow on this, as it seems that at the cutting end of technology the chances of getting a lemon router are much higher.
So I'd say Premium buy this one (unless you need the addn'l features of a business router)
I’ve done significant research and it seems that Linksys currently has the fastest router available. And I’m sure the ability to remotely reboot the router will come in handy.
http://www.linksys.com/us/p/P-EA9500/
However reviews indicate that a lemon is a fairly high likelihood about 1 in 10. There are also business versions. However I’m not sure that they offer much to us beyond what the consumer version does. Cost is high at $338.58.
Netgear. Their R8500 is the latest, and at $365 Reviews also indicate about 1 in 10 is a lemon.
ASUS:
RT-AC5300 is their flagship about 1 in 5 failure rate. $376
Value option:
TP-Link:
Archer C5400 http://www.tp-link.us/products/details/cat-5506_Archer-C5400.html $250 No failures, but in some cases only providing the low end of 50 mbs instead of the higher 300+ mbs that are achieved on other routers. I’m never used this company before, but just researching the top tier routers makes me more likely to buy them in the future. Some users report HUGE range gains. Some routers have shipped without the MU-MIMO. It will require a firmware update in these cases.
Dlink:
Discliamer: I normally use these guys.
$369 about 1 in 4 failure rate. These guys were last to the party just releasing their flagship.
You mention the building has lots of steel. This will dramatically decrease wifi performance. You may need to add one or two access point per floor to get it working, but in theory WiFi can be solely used to replace wired connections when done properly. – LPChip – 2016-09-03T16:04:56.947
It is a metal shell building like a warehouse. Would that still be detrimental for internal use? – Pug – 2016-09-03T16:06:31.970
It will likely have lots of metal in its construction too, including walls and floors. they'll jam the signal. As long as the wifi signal does not have to travel through a wall or floor, the signal will not degrade that much. – LPChip – 2016-09-03T16:09:16.860
better conduit might be cheaper. – Tetsujin – 2016-09-03T17:14:55.047