"Off the top of my head"...
Make sure local codes will allow you to do this.
Assume this will not have plumbing
? I.e no running water
and maybe a composting head
Assuming you will partially bury the hull
for easy accessibility, how high is your water
table and what are your soil conditions? If you bury it, and the water collects around it, it's going to want to float. Frost may also be an issue, and can also force the boat
back out of the ground. You will also have to consider drainage and plug
all the thruhulls, or water may leach back into the boat