lol @ BrokenBones1

Ok here goes...
A rotozip uses a smaller 1/8th " bit or something like that. Its thin and can break fairly easily in wood.
However... Rotozip also makes a 1/4" bit which is thick - and fits into a Router! : ) Cuts MDF like a hot knife thru Butter! Ive cut a good deal with it - no sign of any wear. I doubt youd break that bit. (its labled as window/door - i think)
However... my favorite tool is my tablesaw.
It seems to get the most use out of all my tools. Much much faster cuts, easy to use... decent accuracy. Can cut metal by changing the blade to the metal cutting discs. Cut slots using a daido blade.
More durrable than a circluar saw (ive seen cir.saws get bent out of allignment too easily). Less dangerous IMOP... as you can see the blade. Fairly cheap ones go for 80 to 100$ - and work great.
Every tool has a special advantage. Eventually, you will probably want the specific tool for the specific job. Till then... I saw grab a tablesaw. Or - if you really cant afford it... get a router w/ a 1/4" rotozip bit.
I suppose circluar saws are good - but Im just too scared to use those things. I can envision all sorts of nasty accidents with em.