hazlenut - I've used a couple of different tree service companies. I did get a price from a certified arborist but it was twice as much even though I wanted the tree cut down, not preserved. Another tree service I used cut the tree into manageable-size logs and had guys in pickup trucks lined up to haul away for free - I'm guessing firewood although this was a big oak and there might have been other uses planned. Another one used in neighbor's yard chipped up most of the branches and hauled away some pretty big trunks with company truck. 3 dead ash trees - yep, emerald ash borer. DD just had some old farmhouse maples trimmed and kept all of the branches and sawdust for hugelbeds.
