Replacing Black Water Tank

[Tamara]

First let me say I have already gotten some very useful tips from all of you! I am looking at purchasing a 66 Overlander that the owner says is in need of a new Black Water tank. I am trying to research costs and the labor involved before I make a purchase, and need your help.

What size should the tank be? Where is the best place to find a new one? How much should I expect to pay? And how much labor is involved in replacing it?

I have read the posts here about adding grey water tanks and like the idea of just adding either a portable one or an external one, but if I have to go to the trouble of replacing the black, would you suggest a permanent grey as well? If so, how big?

Any tips or tricks you can provide me with will be appreciated. I am surfing the web now for answers but thought perhaps you all could provide the neccessary info.

I'm so excited about possibly finding "My Aistream" that I can't even sit still....if she comes home with me I'll be sure to post a picture! :-)

Thanks,
Tamara