Hi! My name is Guillermo, I'm a Director at Aurora Studio, a Development Studio based in the United States and I would like to help you with your project!
Even if you are not looking to use a master server, you need to either have a relay server or matchmaking server unless your goal is to have local matches only.
1. What is the gameplay about, car racing?
2. What are the enemies?
If possible, could you tell me a bit more about your requirements and specifications? As well as the features you are looking to develop?
I'm in the chat if you need me. If you have any questions, feel free to ask!