Capping it with another layer on concrete may be an option to avoid the removal step. We did that in a 40 x 100 farm shop and it has stood up to pay loader and tractor traffic. Our cement guy said the key to doing this is a 3" layer of compacted gravel between the two slabs. (6” existing, 3” gravel, 6” new) They warned against pouring a second slab directly on top of existing concrete since it will just crack and crumble over time.
You'd have to accommodate the surrounding grade for the additional 8-9" of elevation. You'd also want to cut out and pour a solid footing where your lift is going.
May not work in your situation but sometimes it's nice to have a few options to kick around.
Hope all goes well with your discussions!
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