Most people drip acclimate. I myself drip acclimate eveyrhing for even longer than recomended. It's so easy to do why risk harming/killing a new specimen.
a Q tank is a MUST!! Belive me, sooner or later you will get burnt if you keep adding fish to your display tank. If you're worried about cost just use a cheap rubbermaid container w/ a cheap filter a decent heater and a couple pieces of PVC
for the fish to hide in/around. You don't need anything fancy or elaborate to be functional.