NutriChef NCDH6S.5 Countertop Food Dehydrator Machine

I believe what you are referring to is a freeze dryer for freeze dried skittles. That is a different type of machine. It is made by Harvest Right and costs between 3-5 thousand dollars depending on the size and options. It is a different process. This is a dehydrator.

Yes, there are plastic sheets available that have small holes. I purchased them separately.

I've never tried this, but I have done turkey breast jerky, so I imagine it would work. Might have to shorten or extend the time (I normally do thin strips of turkey for 5 to 6 hours) depending on the thickness of the hearts.

Yes. I have used it to dehydrate nuts. For small seeds I think you will need plastic mesh to keep the seeds from falling through.

I leave it there full time, but no it is designed to make fruit roll ups. i thought it would be good to catch drips, but no drips yet. also, theres some nice silicone mesh options on amazon if you are doing small stuff like blueberries.

Not sure, but I actually just use parchment paper on the regular racks...works just as good for smaller items than can fall through the holes but probably not if you're making fruit leather.