You should go ahead and play this game with those rules, since it was started with them in place. But in the future, you should look towards not limiting your games or it will impede your MP progress. If you don't mind or don't care about being more competitive in MP and only want to play with your friends, go ahead and play with House Rules, they are there to make the game 'funner' for some people. But if you would like to not get frustrated playing other people than your friends, I would try to stay away from strict limitations.

I hope you have fun Drool, there are plenty of people on the forum who can help you as your game progresses, though you had better keep it on the hush hush if your opponents read this board.