Breaking down.. getting IPAD. What are WC critical apps?

Im breaking down and getting an Ipad. I am actually getting it for business. I think it would be sharp to do on the spot estimate forms and send them straight to theyre email.

The other day I saw a craigslist cleaner doing an estimate with just a yellow pad of paper. Not that I’m much different (i use a blue clipboard with papers inside) but it just doesnt look very “pro” imo.

So to the real question what apps should I get? It’s gonna be 3g one.