Went back to IKEA and have 3-4 week delivery.

Check your local laws around how to do this (timing, location, mode of delivery, etc) if the insurance requirement is not part of your lease you can create an addendum and see if they will sign 

Distributors, donation collection companies, shipping/package delivery firms, churches, etc.

trying to sell Dental delivery systems to dental practices and got   shot down then got my real estate license much better.

The builder came back to us recently and said although they had initially expected a delivery date of December, it would be pushed out to March and potentially even further given delays in lumber, concrete, getting framers, etc.

And even if they're familiar, I'd recommend double / triple checking and prices or delivery times on materials that need to be replaced.We purchased and renovated a 3 family in a historic area.

If I am in this situation again I would build in some very specific milestones into the contract to force on time delivery.

Trusses you’ll want to pay for and order early (but delay delivery until you’re ready).

From municipal inspections to parts delivery.

7.00% Fannie Mae and Freddie Mac Delivery Caps.