[brandnewlow]

The restaurant is the user in that situation because they're paying you money. A lot of B2B businesses are like this. The user questions are particularly important for vetting these sorts of businesses precisely BECAUSE the user situation is so convoluted.

My company sells advertising and the equation is similar to your situation. Our customers are marketers who use our tools to launch retargeting campaigns that serve ads to their own visitors. Our products have to interact with those visitors in a way that creates value for the business, but our actual customer is the marketer and we need to know his/her needs inside and out.

The "and you can't speak to them daily or weekly or even monthly" is one of the biggest barriers to entry into many very lucrative B2B spaces. One of the reasons why it took us so long to launch our product, http://perfectaudience.com, after finishing YC was because our initial product was aimed at enterprises we had domain knowledge of (newspapers), and when that didn't pan out and we had to build a product that went direct to advertisers, we had to go out and gain a ton of new domain knowledge from a customer type we weren't familiar with at the time.

B2B businesses are awesome and hugely lucrative if you can build something lots and lots of businesses want. But building something lots and lots of businesses want is a lot harder than building something lots and lots of consumers want because you're much less likely to have shared experiences with those enterprises than with consumers.