Theatre Based Assignment

I'm currently studying my Diploma in Make-Up Artistry. As part of my course i need to do an assignment on doing a budget for a Theatrical Production. I need to list all areas that will be listed on the budget. My problem is that i have no experience with these matters and my lack of knowledge is becoming frustrating. I have no knowlege as to where i can get a basic idea of the costs involved with theatre productions. I have done some research already but the primary areas i'm stuck with are basically insurance, wages, and where people get finance to afford to produce a theatrical production. It may be allot to ask but i'm stuck and feel like i've hit a brick wall. I would really appreciate any knowledge anyone could share at this point. Can anyone help?