Some time back, I was in the market for similar sevices, I evaluated brace.io and site44. If I am not wrong, they both charge $5/month for 5 websites. As a user, I would not mind paying that, because if I want to quickly demo to a client, I would prefer a separate sub-domain/folder without having to pull my credit card for that.
Second, I was looking for minification and compression, great to see that you have added that feature.
Third, great to see that you have contact forms, the first obstacle where you might think of servers. I like brace.io's implementation.
Additionally I liked brace.io's admin and shipping workflow. Do you have anything similar?
Imagine if you integrate this with a future version of NEST thermostat or an integrated lighting, you can create different environments in a single room and change it on the fly.
An electrician working in a Hotel would be navigated to the right junction box.
You buy a new car and the manufacturer provides you with a virtual manual to find new controls, may be even basic repairs.