I have a lot of flexibility. I am equally comfortable finishing up in c#/asp.net or starting over with bootstrap.  I have a contract for a certain amount of money+equity to deliver a working web app, and then we are back to the negotions table where my next proposal will be for the mobile apps.  As for sql server, i think cassandra, mongo, redis, will work just as well. I'm considering using the c# to js compiler currently mentioned on the front page to serve my api to reuse some of the work that has been done. Time constraints aren't anything to worry about, and it would take me an equal amount of time to restart or flesh out the asp.net app.