I play with the software is easy.
To do a correct design mean that used aware on the typical dimension, correct placement etc etc etc.
you may like to set something as 1.1m but if the typical is 0.8m, that wont work. And assume you have 100 things miss dimension like that.

But if you say that it's a peanut, what to argue.
I'm doing it.
I think it worth it my time and I'm an engineer so i can be predict half of a correct thing to do stuff.
And I'm using the ehem ehem software, so no cost.
But that me.

Chief Architect X6.

The lower cost for home user is Home Designer (same company, different but almost same software).
You can download the software and try it out.
You can't save your design though when in trial mode.
If you like it, you can purchase it - if the price is acceptable to you.

Link: http://www.homedesignersoftware.com/products/trial.html