That arena rascal is real nice if you already have relitively soft dirt. If it don't weigh at least 500 lbs it will bounce off concrete like dirt till the teeth are wore flat. There are two 5 footers now on ebay for just $1495 each! Tractorless, another thing you can try before engaging is to run a lawn sprinkler in the arena for an hr or 2. If you have no other use for a box blade, get a middle buster, its a one shank 3 pt. attachment, cheap, or a 4 ft. box blade is under 300 bucks, remove 2 scarifiers, that will be less resistance for the other 2 to penetrate. If you have a dirt driveway the box blade will be your favorate tool.