White-glove delivery + assembly + old-mattress haul-away, how does Magento handle it?

This is the conversion-lift feature king-mattress buyers actually care about. Saatva and Tempur-Pedic both run a variant of the same workflow:

• PDP service-selector, customer picks “standard delivery” (free), “white-glove + assembly” (+$149, $199), or “white-glove + assembly + haul-away” (+$249, $299). Stored as line-item options on the cart.
• LTL freight rate quote, on add-to-cart, a custom shipping module calls the carrier API (R+L Carriers, Old Dominion, ABF, XPO) with the customer ZIP + mattress weight class. The quoted rate + appointment-window flow into the checkout.
• Appointment scheduling, post-purchase, an automated email links to a 4-hour delivery-window picker. The picker hits the carrier’s appointment API and writes the slot back to the Magento order as a custom attribute.
• Two-person crew dispatch, carrier dispatches a driver + assembly tech. The tech assembles the bed frame / platform, sets up the new mattress, and (if haul-away was selected) loads the old mattress back on the truck for disposal.
• Customer confirmation, SMS + email 24 hours before delivery, day-of arrival notification, post-delivery satisfaction survey.

Magento integration is a custom shipping module (~$2,500, $4,000 of dev work) plus a carrier-API account with R+L or Old Dominion. The conversion lift on a $3,500 king PDP runs 30-50% when white-glove is on the page vs not.