There are a few things that you need to have. First and foremost is a good power to weight ratio, 1.5 to 1 or better and lots of control. The more control surface area the better, for the most part. Having said that, I have hovered trainers, Cubs and alike with enough power. First you need to develop the control inputs and the easiest and safest way to do that is to fly straight up, but strait up while making the necessary correction to keep it there. It make's no difference if you are climbing fast or slow, but the slower the better, as it gives you more time before you setup for the next attempt. When you get better, just decrease the climb and start lower and lower. Suddenly your hovering. Now in order to hover low, touching the ground low, you probably need some kind of lightly loading plane with lots of power and control with lots of practice, practice, practice.

Just my thoughts.

Scott minnesotarc.com