This is a full set of balloons as used for birthday parties and celebrations.
The set consists of 36 balloons; 0-9 and A-Z. I have removed all the subdivs so that the scene isn't too heavy. For the single letter renders displayed I had the Subdiv modifier on level 3 for Render. The render image that is the cover image here is out of the box. About 1 min to render on my average machine. The lighting setup is a simple single light and HDR map which is included.
I will include a link to a tutorial I'm working on to show how to balloonify anything here soon! It's a fun process.