Well, the game is heavily designed to force you to use RMAH to get better items because item farming in D3 is very time-consuming and less rewarding

FU Blizzard. FU Jay Wilson.
Item farming is suppose to be time consuming

Or do you intend to finish the game in an evening's play? If you have played D2 you would know that getting the best of the best gear took most people several years to obtain... (unless.... wait for it... they traded to get better gear...)
And if you are missing the cheats of single player D2 where you simply uploaded whatever gear you wanted and what level char you wanted, I suggest you go find another game that does not require any dedication to play.
Or if the RMAH is really bothering you, come play Hardcore

though if you really want even on HC you can use real money to go buy some gear...