I imagine the oil changers each have a vendor who fabs the stair, angle iron frame at slab opening (with embeds) and the guide rails. The owner would typically furnish those types of items to the GC and the GC/Subs would install.

I'd personally go with a lift as they are pretty inexpensive ($3-4K) and allow you to park two cars in the space of one when not in use.

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Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)