the quick and dirty, and ugly ergo 4k that i first modded (and still use) only really took me 2 weeks to do, i put the total cost of it on the wiki, but from memory it only really cost less than 70$ or so, which is pretty good if you think about it, i mean i went all the way to mod something to my satisfaction, and overall(aside from it being totally unpresentable and ugly) it works perfectly. Again i had zero skills with anything, i damn near burned caluss on my hands learning how to solder and what is soldering, cutting wire, flicking melting hot plastic in my face with a dremel, it was a learn as I went project, that a lot of GH ppl helped me on (what is soldering, whats a good iron, blah blah, many helped out with my noobness).
even my 2nd verson of the cherry ergo 4k didn't cost much in materials, sure i spent more, i mean i went and bought better looking wire, i wanted a newer soldering iron cuz i'll be working with it more (i used an el cheapo radio shack one for the first one), i learned about putty and spray paint.
If you really really, really like the ms ergo 4k like i do, and DO NOT want to compromise the muscle memory you've built up over the years or believe that the ms ergo 4k is just that good, well make your own, otherwise i only really see the kinesis as the only alternative really (and i was not willing to "learn" the kinesis).
i'm actually going to try to finish up my work, i've been working like a dog for the past 8months and i think there's a tiny stretch of window i can devote to finishing up the 2nd (and prettier) ergo 4k cherry mod (it's 95% electronically complete, just the spacebar isn't connected), then ppl can see a finished work log i guess, but what is on the wiki so far is enough to get anyone started on a ergo 4k cherry mod, if you want it quick and dirty.