Congrats on your pregnancy :)
You could always go with prefolds and covers while the baby is smaller and doesn't fit into the diapers you've been using for the older daughter. They're economical and easy to deal with (you can either use a snappi or just let the cover hold the diaper on). We used a combo of prefolds and kissaluvs size 0 fitteds while Ruby was small, I'd say it was 2-3 months before she fit into the one-size pockets we use currently. We had 6 or 8 covers, maybe 12-18 prefolds and half a dozen of the fitteds and we washed every 18-24 hours, so 2 dozen prefolds would probably be a good 2-day supply (give or take a few hours). And I bet you could get that for under $100 at a site like little lions.
We CDed from birth, and I mean that, the hospital used prefolds as burp cloths so we just brought a couple of covers (only a 24-hour stay after a vag birth) and a snappi, they did the washing and then DH got to teach all the nurses how to use the snappi. (and I do believe we "made off" with one of their prefolds! LOL) it wasn't for a while before she had a disposable and the first wasn't our choice, the LC insisted on it, despite us having a clean cloth at the ready...~sigh~ those LCs REALLY helped me (she says with a smirk, still using a shield for a 1 year old).

(Thanks Lorry (lorryfach) for my siggy :D)