[Frondo]

Also in a similar situation now (well, in the B2B space, with ~20 corporate customers around the country) and the times it's come up, people have been more concerned to see a business continuity plan than a big office full of people who can take over.

You can find lots of examples for a BCP on any search engine, and in my experience so far it's more important to show that you've thought about it and at least have a plan in place to take care of business continuity, should something happen to you, in the future.

Another thing to keep in mind is, even if you had staff who could keep a platform going, until you're running quite a large operation, even finding someone who'd want to take over should something happen to you is going to be difficult. I'm eyeing a buyout by a large competitor in the distant future for that, because this is a really niche space and requires a lot of technical knowledge and people skills.