<p>I am new here and would like to work on a project to 3D print a precision prototype. What is the most affordable way to do it? How do I go about it?</p>

These two videos seem to give a good, general, entry-level introduction to the various technologies and processes that are involved in 3D printing:
The Ultimate Beginner's Guide to 3D Printing - Part 1
The Ultimate Beginner's Guide to 3D Printing - Part 2