Maybe I am injecting where I shouldn't, but since you mentioned the router plane, why wouldn't a Lie Nielsen small router plane be just what you are after? Of course price, quality and the company itself comes into play too. At the same time, if you are like me, you would rather spend ten times the hours making your own woodworking tools than buying something off the shelf.
I just was not sure if you were aware that LN made these small router planes? Interestingly enough that was what I was making on my last day there.
I have no intention of traveling from birth to the grave in a manicured and well preserved body; but rather I will skid in sideways, totally beat up, completely worn out, utterly exhausted and jump off my tractor and loudly yell, "Wow, this is what it took to feed a nation!"