Looks like a perfect project to create a Furniture Library with all Balton elements. Using the models in such a library you can construct any system you want.
If you need help with specific models let us know. Considering your 'dinosaur of a PC' it probably is a good idea to optimze the models for size and face count, something I've been doing to the extreme for the past years because I work with very large projects that 'stop moving' when they get too big. Extremely optimizing models has helped a lot for that although it requires extensive use of Blender besides Sweet Home 3D.
One tip that will help you immediately; do not use cylinders to create the wire shelves or posts. Use a 'cylinder' with a limited number of sides, I always use 12 sides (Dodecagon
) and when you smooth these in Blender is looks like a normal rounded cylinder but much smaller in size. The Shapes library you can download at Dodecagon.nl has such cylinders but they are also very easy to create in Blender.If you use the Cylinder12 from the Shapes library make the top and bottom invisible before export if they end in another cylinder. That reduces the number of faces in the model resulting in a smaller object. (Parts made invisible before export are not exported, a realy easy way to separate parts from an existing model.)
If you have the exact dimensions of models I'm willing to help with creating a few of the models and creating a Furniture Library. I think the non-texture models are pretty easy and quick to create.
If you want to share models or projects you can use a host like mediafire. Sweet Home 3D also has a 3D models site on sourceforge for sharing models.
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Dodecagon.nl
1300+ 3D models, manuals, and projects
