Hello. The moon drawing and the tree will be fairly easy and if I understand you correctly, the entire t-shirt drawing will be in a single color on a white background. Or, may I suggest, it can be in a single color on a transparent background. In other words the t-shirt itself will be the background. I have five fonts that might be appropriate, Cast Iron, Shadowed Serif, Coffee Tin, Mesquito SF, and HFF Young Wanna. I think the last two would be the most appropriate because they are old west looking, but not too complicated. In other words, the wood grain effect will be more visible. I have many bitmap fills that would give a wood grain effect, but to comply with the single color requirement, the effect may have to be simulated (drawn by hand). I bid for three day delivery to give us a chance to communicate and to give you a chance to assess my work and ask for revisions. I'll deliver the file to you in an .EPS format that any t-shirt printer should be able to work with. If you need any other format or if you have questions or clarification to provide, please contact me. Thanks!
Update! It's a few hours later now, and I have a design worked up if you would like to see it. Let me know.