I'll install a bathroom fan for a small washroom on main floor of my old
2-storey house. As I got suggested from this forum, the fan can be installed
on the ceiling, and vent out horizontally in between floor joists. Need
advice on two issues:

1) Exterior wall is stucco. How can I make a 3" round hole for the duct.
Need to rent some special tool from Homedepot?

2) Inside stucco, what else I may encounter, and hard to handle? could be
"wood bearer"?

Thanks!

John