This is interesting to me. I can't remember the last time if ever someone contacted me about needing a DJ to play for them for 2 hours. Personally I don't like short events like that. They for me don't give me enough time to really show my stuff. Especially if there is to be some serious dancing. I would quote each one a price and let them decide if they want to book my company or not. I certainly wouldn't expect either of these gigs to be high paying gigs. Now if they agree to my prince quote then the job would get done. If not they can keep searching.
The thing is what would you expect such a client would be willing to pay? I say probably no more than $250 and more than likely looking for you to go lower than that.
And in some instances, you would be wrong. It's not about what a client is willing to pay - it IS about conveying what you think the value of an event is. If your customer believes in that value, they will buy it. If you can't show your value, then you will not be commanding any dollars.
How's that Business Plan? Website? Taxes?