I could see the same thing doing well outside the US embassy in London.
Offer a US-visa sized passport-photo service, a locker to put your phone when you can't take it into the embassy and some tissues to wipe away your tears of joy/despair and you'd be in business.
Add to that a £10 glossy file to give the assorted papers of your $2,000 application that final touch of gloss and you could make a wonderful income.
OT but funny story I heard. The US Embassy in London wants to buy the land underneath it in Grosvenor Square. That bit of land is owned by the Duke of Westminster. He said he would gladly agree to sell them the land as soon as they returned his familys land in Virginia and New Hampshire that were taken in the 18th century.
I doubt it is even remotely true but funny nonetheless.
There's a shop around the corner from the US embassy in London that does all the needed photos. 2 min walk, very affordable and very friendly. The people in the embassy recommended him.
Offer a US-visa sized passport-photo service, a locker to put your phone when you can't take it into the embassy and some tissues to wipe away your tears of joy/despair and you'd be in business.
Add to that a £10 glossy file to give the assorted papers of your $2,000 application that final touch of gloss and you could make a wonderful income.