Bourbon can be an expensive hobby. Special releases and Limited Editions are not cheap and only come in 750 ML bottles. There are a few Bourbons/Whiskies that you can find in minis but these are usually from the Giants (Markers Mark, Evan Williams, Jim Beam, etc.).
Here are three tips to enjoy Bourbon without breaking the bank:
Find a local Bourbon or Whiskey Bar
I know, you will probably pay $20 for a 1 oz glass of Pappy or Four Roses Limited Edition but these are Bourbons that you will usually drink on special occasions any ways