J3nsen, if you can make anything ou of sketchup, then I salute your abilities. As far as I can see, sketchup serves one purpose- to fill your hard drive.
Sketchup is free. It is still too exensive, so well done indeed.
As for file format- if you prefer sketchup, then develop in it and use another free programme- blender etc- to re-save it in a correct format.
Well done for progress in sketcup anyway
Stu