analog tent

Hello! I was faced with a problem. I have the opportunity to work in a good amusement park, but for that I must come up with similar tents. It should be a bright and interesting design! I'm going crazy from the thoughts and nothing good can come. Funds for the construction of small. found a picture on the internet thinking of doing something similar.Naturally without the bench, under the semicircle want to put a table and chairs and store displays. It is also possible to close the side walls and pasted it all colorful pictures.
The design should be fixed and worked for 5 months. Forged metal in my country is very expensive - if you can help me with the choice of material? or simply appreciate the idea...
or maybe you have a photo of any other notable structures other than tents. I will be very thankful the advice.