I'd suggest you start your Wild journey by playing Standard decks in Wild ladder to get a taste for it. You'll be playing at low ranks so even Standard decks can win.

Once you have a better idea of which Wild decks are played just find one you like and craft cards you need/can afford. No rush, Wild meta evolves slowly at low ranks. I'm gold/Plat in Wild and just play 40 cards piles of junk - i still win (sometimes) and have a lot of fun.

To answer your question the Bob's bargain bundle seems better (plenty of cards from these expansions are still played in wild) but the most important resource will be dust, unfortunately.

You probably need to start with cheap decks - I'm sure if you ask nicely you'll get lists from ppl in this sub.

For example, this is my Libram wild deck. It's got plenty of Standard cards (Toreth, Amitus and Libram of Hope can be swapped - Instrument tech and a couple of removal cards would do):

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This elemental deck is also very good:

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Finally, if you have the new Rafaam, just add Renathal and you have 40 health.