Maybe I've worded this incorrectly, but they're basically saying, "What happens if you get hit by a bus?" My co-founder has access to one of our three projects, but no one else has access to Heroku, GitHub, etc.
Also, the Heroku vs EC2 is another can of worms. Heroku is the better decision for where we are now.
"Every blog has yours own API which allow a user to 'get connected' to it (to the user point of view, it'll be only a button to get connected, every technical detail will be hidden)"
Have you looked into any coworking spaces? They might be able to accommodate you for a few weeks. NYU Poly has incubators on Varick St. in Manhattan, and an office in DUMBO (which I've been working out of for several months). Good luck!
P.S. I know NYU Poly DUMBO has open space, it's in an awesome area, and the management there is friendly.
Also, the Heroku vs EC2 is another can of worms. Heroku is the better decision for where we are now.