> My son and his wife are desperate to live here too. I have suggested
> that they apply for B Visas and then for a 6 month extension.
BAD IDEA.
This is exactly how people get in trouble. The visitors visa is for: visitors. By staying a whole year on it, he would make it pretty clear to the goverment that he is not visiting but rather intending to immigrate. Yes, he would in all likelihood be able to obtain a B1/B2 and maybe even an extension if he makes up some tearful story how he has to take care of you bc you are sick. But if he went back and tried to re-enter the US after a brief time period, he would likely get a refusal of entry.
> However he has heard that if his B Visa is denied it would jeopardize
> his opportunity to visit the USA on a normal I94 3 month stay.
Well, question 'F' on the I94W asks: Have you ever been denied a US visa or entry into the US or had a US visa cancelled.
It is recommended not to try to enter the US on an I94W if one ever had any 'yes' answers on the back of that form.
But why should he get a denial of a B1/B2 visa ? Yes, he has a close relative in the US, but if he can show the appropriate ties to his home he shouldn't have a problem to get a visitors visa (the odds of getting a refusal at the embassy are probably the same as the odds of being sent back when presenting for admission under the visa waiver program. the consequences of a refusal at the port of entry are far more dire).
> Would it show on his passport?
It will show up in their computer.
> It will be at least another 4 years before we can obtain citizenship
> and thereby sponsor him.
And unless he is underage, it would take years to decades after that to obtain an actual GC (he is married and probably over 21 I gather, so he is pretty much at the bottom of the priority list for family based immigration something like 1998 at this time)
> Any advice would be greatly appreciated as I am getting different
> answers from Immigration Lawyers.
How about going about it the legal way ? He can come to the US on a student visa for example and get a degree. Or he could look for an employer to sponsor him for an employment visa or a green-card. Plenty of options, just please do him a favor and keep him from trying the old 'entry on visitors visa and hope for the best' method. It used to work, it doesn't do that anymore.