Right now I'm working on 2 different projects at once with my friend and coworker, AsterAlff (check out AsterAlff's submissions on this site). Building a mega-project with two people is lonesome, repetitive, and when you're building the parts that don't require artisan work, it is boring.
So I'd like to cover with you what building a mega-project in stages.
Stage One: The Dream
This is the most euphoric. If you're like me, you'll dream for hours about what the finished product will be like. If it's a mansion, you can imagine the mossy cobblestone statues carved out of the mountain with water spouting everywhere, the special lighting, the series of hand-crafted pools and triple ironblock staircases leading to a grand second and third floor.
Stage Two: The Realization
This is the first crash right after the first euphoria. You have now realized that this is going to take a really, REALLY long time. Your grand plan is going to take weeks and weeks of spread-out time, and you don't know what to do.
Stage Three: Ahead of Schedule
Now that everything is set up, and you have all the diamond tools laid out and the millions of chests to store the stuff (if you're one of those people who do everything legitimately) that you carve out, it's time to get building! Pretend you're building the western face of a mansion carved into a mountain, and it calls for twelve mossy cobblestone statues with spouting fountains. You've raided 30+ dungeons for it and you have the buckets. Holy mother of &^$%! You're ahead of schedule! The statues are done along with the fountains! It looks beautiful already! You were planning for weeks and weeks, but you could be done by the end of the month!
Stage Four: The Realization
That was the easy part that you just did, sadly. Now you have lots of menial labor to do, mining out all the ores and stones in your way and carving out the dirt and storing/incinerating it all, stack by stack. If you mess up, you'll have to do emergency surgery before you forget where you screwed up. You could be done with this by Christmas at this rate.
Stage Five: Looking Good So Far
Wow! Your mountain/field/frame/walls are all done with whatever had to be done to it! You give your index finger and thumbs a break, and take a look at your handiwork. Although you know it's going to take some time, you can see where things are going to fit in.
Stage Six: The Realization
Uh oh. Your grand plan is REALLY big, and there are some major factors in your way. Let's pretend you are building a castle in the sky. Now imagine that your castle is being squeezed between bedrock and the sky, and it won't fit. You have to remove some sections and do some corner-cutting. Maybe the quality won't be so good. Oh, and by the way, you have more menial labor to do. Enjoy.
Stage Seven: 25% DONE!
You're already 1/4th done! You can see the basic frame of things and you could finish ahead of time! The menial labor in this stage is done, but inevitably, if you're not being watchful at every second, Stage Eight will occur.
Stage Eight: The Realization
You missed your measurements by one block. Maybe one side is even, and therefore there is no clear-cut middle. Your design calls for a middle, but now it has to be twice as big, or risk being ASYMMETRICAL (and that's BAD). Sigh. Back to menial labor.
Stage Nine: Almost done!
You've done the basic stuff and you've carved out everything. Now for the artisan work. If you're building a house, now it's time to build the individual rooms and the furniture inside the rooms.
Stage Ten: The Realization
Turns out, artisan work and hand-crafting gets really damn boring after a while. You've made the same chair eighteen times. Your grand, Henry VIII-sized bedchambers have been done 4 times now. If you're building an airplane, turns out there are a helluva lot of design specifications to follow, and sadly, doing an airplane or anything with artisan labor is difficult when the smallest block is 1 meter cubed.
Stage Eleven: DONE!
Congratulations! You're done with the artisan work, the menial labor, the activity-deprived days, and everything! You just finished doing the details on a wall and it looks GREAT. Most of the realization stages are over! Now to submit it!
Stage Twelve: The Realization
So you finished basically on schedule with your original estimate, and you're not shocked. Your mega-project is done and man, it looks GOOD. After 2-3 months, it's all ready to go up on planetminecraft. Then, as soon as it's submitted, nobody comments, favorites, views, downloads, or +diamonds the thing. You were hoping it would get popular project, but instead you get around 150 views and 100 downloads, instead of 3000 views and 2000 downloads.
Stage Thirteen: That's done, now to move on to the next project!
Done with Project A. Now to move on to Project B, because it's next on the list.
Stage Fourteen: The Realization
You have now realized you have 2-3 months of joyless project building ahead of you.