1. please go to home depot/lowes and get 4X4X48 wood before starting. 
It took a lot of work to complete. I had to dig a 30" hole for the wood and learned how to use a power drill on youtube. I'm a 28 yr old woman and I installed the mailbox myself. It came out beautiful and took me at least 4-5 hrs after getting all the extra supplies necessary. Its definitely a great DIY.

Pros: Love the durable finish and quality of the mailbox. It's a very heavy and sturdy mailbox 
Cons: would be nice to know about the extra material before purchasing