I remember this feeling. This is the same feeling I got when I bought I don't remember how many boxes of various kinds of tile, tiling equipment, backboard, grout, grout sealant, a new toilet seal, paint, a new cabinet and sink and faucet, a new medicine cabinet, and completely redid a bathroom for the first time. I may have even changed the light. It's been a while.
I remember ripping out the floor and old tile with glee, stripping off the old wallpaper with slightly less glee because it didn't want to come off nicely, pulling out the toilet and then looking at the mess and thinking OMG what have I done.
I'm sure I'll have a similar feeling after we take out the old carpet and pad. Not only will it be dusty and stink to high heaven (I remember this from when I had a contractor put in laminate floor downstairs) but then I'm sure we'll discover something. And the something will require more work than anticipated. I figure that something that ought to take about a week will end up getting finished, oh, just in time for Yule if I'm lucky.
About the time that we start really moving on it, though, I know the excitement will carry us beyond the exhaustion to a spectacular finish. I remember that too, when I rented the tile cutter for the finish work and got it all done in two days. Not only did I see that the light at the end of the tunnel was not in fact a train, but at that point the project was so close to being finished that it really, really looked awesome.
I have a few tricks ready in case we need them, like varnishing over pet stains so that the scent is sealed in, and painting the walls the color I want before the floor goes in because after, when you've got a new shiny floor you don't want to scrub off all those little pinpoint speckles that rain down, and you don't want to leave the walls the way they are because all that perfection on the ground really makes the marks on the walls and stains on the ceiling stand out ...
I'm tired already, and we haven't even started yet. Wish us luck!!