As Nick and Scott [electure] have mentioned, check into some of the more "User friendly" types of CAD programs. You might find just what you're looking for with them!
I know that TurboCAD comes with many blocks [symbols] in several libraries - such as wall framing, plumbing, windows and doors, HVAC, Electrical, landscaping and even some LAN stuff.
I would imagine the same from Quick CAD.
Nevertheless, Blocks [symbols] are everywhere on the net! Plus they are simple to create.
The real drawback about any CAD program is the learning curve! Getting to know the terms, how to use the terms, where to find the terms, etc. is the first giant step! The giant leap for mankind comes from putting things together and making a drawing that looks like a drawing!
The programs described by Nick and Scott are so much easier to jump into and have smaller learning curves, as compared to professional CAD programs [AutoCAD, Microstation, etc.].
After a few years of using the simpler ones, you will probably find yourself wanting a more powerful CAD program. That's when it's time to fork out $1,000 to $5,000 bucks on a full professional CAD version.
If you're just starting out and plan to draw only basic stuff [floor plans, basic 3D stuff, simple electrical schematics], then go for the simple programs and stay away from the high end pro stuff. You will get discouraged by the extremely difficult user interfaces and drop the whole idea of drawing plans [don't let this happen!!!].
FYI: You could try using some graphics programs, word processors and even some scanning programs, for plans.
Graphics Applications, such as Adobe Photoshop, Paint Shop Pro, etc. can be used to create plans.
Word processors, such as MS word, Excel [I know it's a spreadsheet app, just wanted to include it], and Visio [a stencil type program] can do quite a bit.
As far as scanner utilities / apps, I have Paper Port and it can double as a "quick and dirty CAD application". The benifit with paper port is you can scan some hard copy, then edit it, then paste stuff around, and draw multiweight linetypes [lines of various thickness].
So much for the Public Service Announcement from your friendly CAD association
Hopefully you can find a comfortable application for a good price.
Now, the next step is buying a wide format printer or a plotter!!! They start around $2,000 for a simple D size printer [my HP designjet 450C was $1,800 for the printer, $200 for the stand, $200 for the rollfeed and $40 for 24"x150' vellum. this was in 1999].
Plotters will be more expensive [unless used]. If buying a used plotter, stay away from the ones with the HPIB interface [IEEE 488]. It looks like a shrunken printer port.
It's almost impossible to find the interface adapter [card], and if you do, they cost mucho bucks!!!
Rockwell Autonetics surplus sales usually has go-zillions of old pen plotters for sale.
You can always have a drafting shop plot drawings on D or E size paper, or have a close friend with wide format printing abilities do for you [will be your best friend from time to time
When this becomes old, it's time to buy your own printer!