>Do most of your customers expect close to 100% uptime? Yes. I think this is mostly a self imposed requirement. Banks regularly have overnight technical breaks

>Do most of your customers expect close to 100% uptime? Yes. I think this is mostly a self imposed requirement. Banks regularly have overnight technical breaks. My country national rail has 30 minutes of downtime every night (!). Unless your product is already global, most people won't have a problem with occasional overnight scheduled downtime.