All,
I wanted to say thanks for all the help, advice and opinions on this subject. I've opted for a 4-post lift for two of the reasons pointed out: 1.) I've got a failed knee replacement so I cannot kneel down or squat. Getting down on the ground is an exercise in pain and the less I have to do the less grumpy I will be. Removing some of these bolts is already going to challenge that boundary. 2.) It has castors so I can move it around inside my shop. When I got started a couple weekends ago I had no intention of spending money on the lift. It took me three days to recover and only one day to change my mind.
Thanks again for the guidance.