Are the sides of your alcoves perfectly straight and square? No scribing required?
It's just two cuts you want to make and you don't want to fork out for a powertool, I'm sure you could get an acceptable result with , a handsaw and some patience.
Otherwise as was suggested, a circular saw and rafter square would make quick work of it.
Are the sides of your alcoves perfectly straight and square? No scribing required?
It's just two cuts you want to make and you don't want to fork out for a powertool, I'm sure you could get an acceptable result with , a handsaw and some patience.
Otherwise as was suggested, a circular saw and rafter square would make quick work of it.