My husband went to the broker preview on 9/28. He said the mello Roos will be about $3/sqf annually. Say your house is 4000sqf, then the mello roos is about 12,000. That's on top of the 1.0785% county tax. Averagely you are looking at paying 1.7% up to 2% of your purchase price.
AD ALERT...
The price of 3s in phase 1 last year was $1.09m. Phase 18 is $1.25m. That's a lot of appreciation~$160k. Is phase 18 any good? the houses are right along the busy street, will be very noisy.