Kapow Hospital ND
Unlike Fire Stations with the natural Disasters DLC if you add a helipad marker to a police or medical building helicopters will not spawn. Added a 1×1 sub-building for the hospital and imported to this asset converted for a HelicopterDepot. It should be found under your Healthcare Tab. At the moment it seems like the only way you can have both helicopters and multiple service vehicles spawn from the same building.
If you wish to try this yourself, I posted instructions here. You will need the 3rd, 4th and 7th mod found in Snow_Cat’s and cerebellum’s linked collection. However, you do not need any of them for this asset to function.
Credit to CO of course for building building.