Hello,
I'm a professional draftsman, so I use a lot of expensive products like AutoCAD, but I did read in one of my trade magazines that there are two products out there that are free! CADLogic
Architectural CAD from CADlogic UK. Architectural CAD & building design software inc. bespoke software & add-ons for AutoCAD, AutoCAD LT & ADT. and Solidedge 2d Drafting v19
Solid Edge Free 2D Drafting Software - Version 19 They both are 2D drafting programs so Sketch up is still going to be better for working in 3D, There is a review of the software in the most recent copy of Cadalyst at
Cadalyst - Home Page that you can read at
Cadalyst Labs Review: Getting the Last Drop - Squeeze the most from your software budget with low-cost CAD solutions - CAD Management
I know a lot of people who use vectorworks and find it pretty easy to pick up. I'm not sure of the price for that, its not as much as Autocad, but still a few hundred I believe. In school they used to have a class on a program called Turbo Cad. I never used it, but I think its supposed to be full featured and less mony.
It you just happen to have money to spend you might want to try something like AutoCAD LT. Its a scaled down version of the full package. I believe it will only do 2d.
If you end up going the AutoCAD route and have questions, feel free to ask, I enjoy talking about drafting about as much as I do old tools.
Good Luck,
-Kevin