You and me buddy...same boat.
I'm a noob to whiskey as well, Just over 2 months, and I've been buying a bottle just about every other day...probably slightly more than that, though I only have 2-3 drinks a night. I too like to collect as a hobby and for personal consumption only . I like strolling down the street and popping into a liquor store to see what's on the shelf. Occasionally, something will pique my interest.
As far as going over the deep end, well I can't answer that. For me, I buy what I am willing to throw at it as a hobby, knowing that I'll have to pull back if it ever becomes an addiction (on the purchasing or consumption side)...which is a very fine line.