>>48265688If you want to collect full sets your best bet for starting is just buying common card lots for sets you want. Then you can start buying anything you couldnt find/holos as singles.
Base Set Unlimited is like $1000 completely on ebay but most of that price is Charizard/Blastoise.
If you're looking for a challenge try completing one of the e-reader sets. Expedition goes for $10k on ebay.