I would like to point out that the option to select the correct tool is not available on the first farm you are hired to do.
Here is a screenshot of the tool selection you get on the first farm.
https://www.dropbox.com/s/p6hb3zgag7...43.43.png?dl=0
Any farms after the first one you get the full selection including the correct one.
So if your first farm is a 46x46 6 or more layered farm and you got these tools you are in for a huge headache.