Design for t shirt

I have a design idea for a t shirt that i need created. The design is for a scenic tourist area here in the west of Ireland. I would like to keep the costs low so the design should have no more than 3 colours in it. It should be done in ai or psd format. I would require samples of previous work and mock ups of my the design before awarding the project. The first file attached is of the area i want designed. The other files give an idea of what style I like.