You can static your local IP to 192.168.0.2 on your computer to access the miners without going out and buying a new piece of hardware.
yes he can go to youtube and get the instruction on how to go directly from the pc eth cable to the rasp pi cable.
I have laptops with the the following ips set.
192.168.0.1
192.168.1.1
192.168.10.1
there was a decent video on youtube that shows how to shift his pc to 0.x vs 1.x
bu since he flashed the card there is no way to tell if the flash he did is good until he has a 0.x router to pc
You have not or maybe you have sent 20 pms with screen shots on what to do to 6 or 7 guys only to find out most of the flashed cards were wrong.
so i just tell people buy a cheap router rathe then spend the time teaching them to do it.
at op I will take the time to find a youtube link on changing your laptop from whatever to 0.x
https://www.youtube.com/watch?v=1SQ4kzLr5lk