[PxTx]

Back Yard Buddy has a great design and is safe. They are made in the USA and should be able to build one to meet your requirements. I would be comfortable with most wives operating one. They typically cost 3x what the economy guys offer.

Greg Smith has a place in Deleware. He sells economy lifts. I've installed both BYB and GS. I would own either. It is just a bit more critical that the GS lift is kept in adjustment. If the posts were out of adjustment AND you were lowering the lift AND you started to relax on the lock release handle AND you were not paying attention for a bit you could experience an operator induced problem.