I copied a couple texture packages and re-named them and I was able to load the map. I've got a couple very basic pieces of advice that will make things a lot easier for you.
You're working off the grid. I assume you're building your brushes in multiples of 10. You need to use multiples of 16. So, instead of making a column 50 units in diameter and 250 units high, make it 64 by 256. Same goes for rooms, halls, etc. This keeps everything on the grid, everything snaps together more easily, and the textures fit better and are easier to align.
Also, quit intersecting/deintersecting stuff. Usually, doing so creates a more complex brush, which is bad for the bsp. In the center of your map, you have a column and 3 brushes on the floor which were de-intersected to wrap around the column. Next time, just add those 3 brushes into the column without de-intersecting, or alternately you could de-intersect the column, which would look exactly the same as what you have without creating more complex brushes.
The door with the trim around it is also more complex than it needs to be. I noticed you subtracted the doorway then added two somewhat complex brushes to either side for the trim. A better way to do it would be to add 1 trim brush, without the 'door hole', so it extends into both rooms, then subtract the 'door hole' right through the brush. Again, less complex brushes and, in this case, fewer visible polys, but it will look exactly the same.
Anyways, you should probably start over with this one, keeping everything on grid and as simple as possible.
I hope I'm not being too confusing. I'm not good at explaining stuff.
BTW, Bot_40 is right. a map a week is an unrealistic goal, especially for a beginner. Take your time and make something you're satisfied with before you release anything.
-MoUtH4WaR
