Greetings . ^.^
I'm very short in budget of a few hundred to 1K , so I must be very cautious in expenditures.
This means that I can't spend much money on subordinate stuff .
Is there any advices I could apply for running a campaign ? 
I think realistically you need to find a way to generate some secular income before you dive into paid traffic for any kind of campaign. A few hundred bucks isn't going to provide you a ton of data and gives you little margin for error.