It is such informative to learn by your experience fellow Monks!
Sorry I didn't mention it earlier... My calculations (given the actual machine that the server will run on) show that it might take something like 7-8 mins, 10 at tops but quite uncommon cases... Usually no more than 3-4 minutes. That's why I was thinking the "Please wait" page, or is this time too much?
However, these 3-4 minutes I am writing here as the typical response time that I am speculating, is based on the assumption that only 1 user will run at a time, else this time gets prolonged (I mean if I don't do any queueing system underneath).