Shaun,
As i think i mentioned before, if you do start an import/export business, there's nothing stopping Peggy getting business visa's to the states, so there's another bonus to think about. That will mean that she can visit the States on a fairly regular basis. I wouldn't mention the fact about any marriage plans in the offing when first applying, not until she has completed at least one round trip at least!! ...lol!!
Bonafide business visa's are a dammed site easier to acquire than any other type of visa to enter a foreign country, that's for sure....
David....
PS.... I'm not sure if the States, are anything like the UK, but in the UK you can go to the main passport office for your area, and providing you get there earlier enough, you walk away with a renewed passport in your grubby mitts in the afternoon. I've actually done this twice at the main Passport Office in London, and there's no extra charge either, ...well there wasn't when i last went this route. I'm pretty sure you will have a similar system, as they have to cater for emergency replacement passports etc,etc.....