Disclaimer: We have no carpentry skills. Just determination and a circular saw and hammer and a drill. This project is simple enough for such skill-free people such as the hubster and I. I'm sure you could do a much better job.
The entire project cost less than $80, and was financed by money from selling goat's milk soap. I try to make the farmlet finance itself whenever possible. This way I figure the resulting grapes will be free. This is one of my favorite words, even more than "clearance." Here is how we did it: