What if the ideas failed due to poor execution? 

That is likely why they did fail. 

 

Are they professional grade sketch files? 

They are pretty good for the most part, but definitely not professional grade. 

 

Do you every worry you will run of our bad ideas?

Never. 

How many more ideas will you build?

As many as I can. I am delusional. 

Are these all of ideas you have built? 

No, there are many others.