I am creating a business plan for my business subject in the University. I would like to simulate the creation of an online business of weight lost follow up online. That means, a website where customers would register their weight, food habits, etc and then, when having a personal access, follow up daily menu instructions, register their weight lost information, and any other.

I would need to know what are the technical needs to do all the above: database software, pay for a server to stock information,... and the costs it would implicate.

I am not a technical person so detailed information or any website where I can refer to in order to obtain it would be very much appreciated,