I'm looking for a shopping list to cover all of the major army builds for those three armies if anyone has the time and/or desire to type something out
To come up with a shopping list the easiest way to address that is to take the relevant Army selector.
Assume you want to play 2k lists (smaller is OK for quick games and during bootcamp, but 2k will make for a challenging game)
Remember that 2k actualy doubles the numbers in the selector
2 packs of characters
2 x the number for each mandatory unit
at least 1 each of every other unit (if you have the funds to spare, it is a safe bet that those units that have a max cap / 1000 are probably worth their points, so invested in getting some of those extra !)
The above will give you slightly over the 2k mark and will allow some tailoring of your lists for different opponents/scenarios/terrain
For Bretonians specifically you want to take into account that they have the special Breakpoint rule, so take enough knight(variants).
Blister-2-unit wise you may consider to underpopulate your cavalry stands to get the extra millage from the blister and to remember that bretonian archers even allow single figure snippage. This will allow for some variation in placement and for eg. a unit that is just a line at the back of stands with stakes in front. Again this will get you extra millage from the blisters.
Also consider that Empire Crossbowmen or halbediers, and even flagelants may be used as alternative units for regular Bretonian infantry. Just put them in the correct livery for the Lord that hired mercenary troops.....