So, 2,000,000 ÷ 3 vessels ironically, equate to 666,666.66666666 per boat (granted, there may have been a larger fleet). I have no idea what the displacement capacity of these may be, however, cannot imagine its too great... The statisticians and quantity surveyors will be able to calculate accordingly.
Then there is the wind... I doubt it prevailed day & night, month in & out for all those years - no bricks, no building - frustrated contractors. No tomb fit for a king...
Imagine the pressure daddy Sneferu was under - two gigantic pyramids at Dashur, in the same span of time... (their time on the throne 23 & 24 years respectively) and remember, there was no cross-generational business... Egyptologists really should stick to vases & potsherds.
Thoth wrote the pyramids after Ptah conceived them - makes much more sense. The boats are symbolic - Sunboats which cruised along the horizon with the Sun disc as cargo and docking at G1 & G2 'jetties' (causeways) - hence their dry docks around G1 - 'the pyramid of the place of Sunrise & Sunset'. [grahamhancock.com]