Do you really need 87W of power delivery at home? Is 60W not sufficient for general use?
I haven't received my MBP15 yet, but when using my rMB12 from something like a 12W supply (USBA to USBC cable attached to 5V 2.4A supply) it runs just fine -- though it'll charge more slowly -- or not charge and pull some from the battery when I'm doing something heavy such as creating a bunch of previews in lightroom -- and then when the compute load drops it'll go back to charging.
So from that I'm figuring 60W ought to keep a MBP15 running pretty good for anything but the heaviest loads when it'd start to dip into the battery until the load backed off a bit. So maybe a big long multi-hour render you may need more power, but for general use?
I could of course be wrong, but I'd say give it a shot -- just buy from somewhere with a good return policy.
(FWIW my rMB12 came with a 29W charger, so 12W is *much* more of a drop than using 60W would be with a MBP15)