Well, if you are looking to eventually move on to greener pastures, a lot of charter outfits are looking for someone with an ATP. With the way the industry is these days, you need to set yourself apart from the rest and give yourself a leg up. I'm sure your CP is pretty cool and he will give you a good deal on the airplane. Try not to think about the initial costs, but think of it as an investment for your future career in aviation.
Cheers, and good luck!
Lax