There are many good dehydrators out there, and the simplicity of them makes it tough to make a bad decision.
Do not use it in your living quarters. Garage, deck, patio... ok. You'd be amazed at how much moisture food stuffs contain.
I did about 5 lbs of green and red bell peppers in my garage (BIG garage) and it took months for the smell to go away.
Do you forage wild mushrooms? Many are actually better when dehydrated and reconstituted. Some, not so much...
Yer gonna love whatever you choose.