end of the day it'll be slightly taller than the defiler-to-dread conversion i made. while larger than normal, i never ran into anyone unwilling to play against it and had no issues using it in any tournaments. I say go for it, so long as you're okay with taking a small amount of "I can see you" extra fire.
as for the project, go for it! two weeks! looks like you have most of the structure done. the rest can go pretty fast, especially if you have a lot of bitz; just plop down in front of the tv and start mashing green stuff together