Getting the right visa

It's forbidden to have interview with a tourist visa and you can't change your visa in work visa in USA, because you must make the asking to the US Embassy in South Africa, so, in your situation, you can't do nothing.

If they don't want to do a Skype interview it's because they are not enough interested or because they think you  have already a working visa. And to obtain one, the employer must prove that NONE US or resident has the skills for this job... This fact is available for 99% of countries, even in Europe if you are out of it... (only EU/Schengen area citizens can find a job in another EU/Schengen area country without working visa)

So, it's very hard to go for everyone to find a job in USA. We can understand that your situation is difficult but it's difficult for a lot of people, in South Africa, in Africa, in Europe, in South America, etc...

Say us what are your hubby's skills, diplomas and specialities, to see what we can do but without a four-five years graduate, it's very hard to find a job...