Best program for drawing 3D layout plans

[elster]

I use Visio for work to do layout plans, which are in 2D and use electrical CAD. However I think CAD is just going to take me an age to do a building layout in 3D, as I am not competent on plain CAD.

What is the best thing I can use to do this? It needs to be in the 3D due to the beams in the house.

I don't think it is worth me spending a small fortune on, as I wont give it the use for that.

[elster]

Thanks will try those two