[GWN7]

So I'm planning on down sizing in regards to my house. Sell the one in the city and move to my place in a small town I already own. There is a really small house there now (about 400 sq ft) that I can live in while I build a new place. I have sort of found a building plan that I like but it needs some tweaking.

I know I will need a engineer to stamp the foundation and approve the building plan but I want to design and build my own house.

Any one ever use a online drafting program? Or can recommend one to buy?