Elevators would most likely be the safer option, and they might probably be much safer too.
Dumbwaiters are generally intended for use in homes are usually much smaller though. If this were true, every prospect would require to with all of the in-house sales-training programs. https://Social-Galaxy.com/story3472786/the-power-of-the-mind-get-rid-of-your-fear-of-public-speaking