You won't believe how much money you will save in the long run by doing the work yourself. Having a slicer that will do the hard work for you is just an added bonus.I'd be lost without mine.It never gets a break.
If you can next time you go out,look for a butcher shop.Most times the butcher's offer if not the same,or better quality of meat,as the super markets offer.Some at half the costs.I purchase all of my meats from a butcher,Whole roasts,chickens,sausages and such,by the cases.He then packages them up for my style of cooking.
You can get a large roast the round ones that have been tied with strings,cook it to your liking.Then slice it up.Cooked roasts slice better for me if the roast is at room temp.Slice it as thin as you can.Every bite will be tender,and fat free.The slicer (Mine anyways) removes the fat from the meat as it slices.I've managed to get slicing down pat.You can get several dishes out of one single roast.I have teenage boys.Can they put it away! Whew..I try to keep up.
It might be a little more work for you,but with the economy the way it is,buying larger cuts of meats,Ham,turkeys and such and doing the prep work yourself,saves more money.
Good luck.
Munky.