Have you found a wifi card that will work on any laptop or desktop?
https://www.amazon.com/Alfa-AWUSO36NH-Wireless-Long-Rang-Net...
although some of the reviews seem to indicate there may have been a change in chipset/drivers. I wish you luck!
It was a pain the get working on my Raspberry Pi, I had to try several different drivers and edit a Makefile to get it to compile. But I did eventually get it working as an AP, there's a script called create_ap which is very nice to painlessly run an AP on Linux.
All of these cards are "known to just work" on linux at least.