One man team - feasible?

I'm planning to make a modern RPG, and doing it pretty much by myself. Is it feasible to develop a TGE game with a one man development team? How many of you in the community (excluding GG employees) have completed a TGE title, how many people worked on it, and how long did it take?

Although this is my first actual game, game development is nothing new to me. I've been programming under various languages in Linux and Windows for the past 5 years, with C++ as my specialty. I've made plenty of modifications/addons to UT2003/2004 in the past 2 years including Unrealscripting, level design, texture art, and 3D modelling. I've also made music on computers for a few years. I'm no "master" at either of these skills, but I get by and do a pretty decent job.

I am still poking around, trying to learn the Torque engine, so the bulk of my game is only in concept at the moment (other than a few modelled objects and a character). My target date is hopefully around Q4 2006. Is this realistic, or is this a pipe dream?

Thanks.