Back order and maintenance plan

Hope you all are well. Redoing the coolant system, and I trusted Rockauto with a radiator, but it’s the wrong radiator. The radiator I need is on back order, so it looks like I’ll be draining the coolant twice.

Anyone else experiencing back order on parts?

For reference:

I have a 2004 e53 3.0i 6speed with 141k miles. Records go way back, and I’m doing maintenance of what I see/hear and preventative maintenance. I separated by area I’m working on.

Day 1(I rented a bay with a lift for $240 for day 1 and 3):

Oil filter housing gasket
thermostat
water pump
expansion tank
Radiator hoses
Intake boot
Maf sensor
Fan clutch (renting tool)
Intake boot

Day 2 (at home):
PCV
Valve cover gasket
IAC
Disa
O2 sensor
Spark plugs
Ignition coils
Maf
Evap sensor

Day 3 (rented bay with lift and air tools):
Front cv axles (clicking on passenger with hard turns)
Brakes all around

Anything you all would recommend to make my life easier or something that may cause problems/is annoying?