I'm a UK citizen and I've been planning a 6 month long road trip around the US for a while, I got my b1/b2 visa all sorted but my girlfriend (UK citizen same as me) is having complications with hers. Upon going for her interview she was found "ineligible". We think this was due to a few discrepancies between her application and her interview. For example, when she originally applied she had no job, but has since got one that will likely take her back on after our trip, among other things. So we've scheduled another appointment at the embassy, with her application all up to date, but the soonest slot available is only two weeks before our flights. Suffice to say we're in a bit of a panic.
What I want to know is what our safest bet at this stage would be? Do we try again at the embassy for a b1/b2 as planned? or do we cancel this appointment and just apply online for the ESTA. I have heard you may stay up to 90 days at a time on an ESTA, but this can be increased to 180 days in a year so long as it's not all at once? It's a bit more of a hassle leaving the country for a few days but we're willing to do this if it's our best option.
I have attached the letter she received after her interview. Any help would be massively appreciated thanks.