I've been using a Makita 4" angle grinder with 1/16" cutoff wheels for years to do all sorts of cutting chores. One precaution- - - -that thin little blade will go bone-deep instantly on any body part that gets in its way, so have a firm grip on the tool as you cut and pay close attention to what you're doing.

For big projects I use a Craftsman 2-speed stationary bandsaw with a tilting head that will cut any angle up to 45 degrees. An 18-tooth bimetal blade and low speed will cut up to 1/2" thick steel as long as you don't crowd it. Aluminum and any kind of wood I've tried is no problem at all. I'm debating whether or not I need a portable bandsaw.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!