I took inventory of the soaps in my den and started the 3017 process the other day. Here's what I've got to start:
Soap Nominal new weight 3017 starting weight Cost Starting shaves Williams 50g 17g $1.99 35 Haslinger Schafmilch 60g 35g? $5.70 25? Haslinger Salbei 60g 60g $5.70 2 Théophile Berthon Savon À Barbe 100g 104g $16.37 5 Zartgefuehl Prinz Charming "100 mL" 110g $17.99 1 Storybook Soapworks Hook 113g 105g? $16.00 8 Mitchell's Wool Fat #1 125g 122g? $11.31 4 Art of Shaving sandalwood (tallow) 100g 80g? $12? 30? D.R. Harris almond 100g 114g $11.50 0 D.R. Harris Marlborough 100g 115g $11.50 0 Strop Shoppe SE Bay Rum 170g 165g? $20.00? 5? L'Occitane Cade Rich cream 198g 50g? $28.00? 75? Tabac 125g 93g $8.00 40? George F. Trumper Violets 50g 50g $2.50 0 George F. Trumper Eucris 80g 98g $7.50 2 Wilkinson Sword stick 50g 48g? $5.02 2 Haslinger Honig 60g 65g $5.70 0 Haslinger Sandelholz 60g 60g $5.70 0 Mitchell's Wool Fat #2 125g 125g? $11.31 0 Barrister & Mann Clusterfig 113g 113g? $19.99 0
I'm averaging about 5.5 shaves per week recently, so I expect this will take somewhere between 3.5 and 5 years depending on a few things.
That's a fair estimate, though the Harris soaps can take you upwards of 6 months depending on how heavily you load. The same goes for MWF and Tabac.