Originally Posted by HighGravity
Is it realistic to think I could eliminate so many steps and do the whole thing in a bottle?
No, not realistic.
All those "so many steps" are there for a reason. If you use a bottle as the primary, and cap at the end, you will have beer ranging from flat, to bottle bombs, with krausen scum on top and an inch or two of dregs on the bottom, lots of other problems as well.
There is nothing special about Mr. Beer yeast. A packet of Nottingham or S-05 is only a couple bucks anyway. Not the place to be skimping, IMO.
I still use my Mr. Beer keg, BTW. Handy for small batch brewing and testing. But I buy good ingredients, including yeast, from full-service HBS outfits.