Help with Schedule/ budget for 1,000sqft in-law unit.

[Miguel Ochoa]

Hello, all I have started getting the permits on building out a 1,000sqft detached in-law unit. I am in the Bay Area and going to attemp to do as much work as I can myself and sub out what I can not do. I have done full interior remodels and am fairly handy. I am trying to set up a time frame schedule and budget on how much this will cost me. Does anyone know where I can get some examples? I am currently basing my budget off rough estimate I have gotten from GC’s ( $200-$300K). A family memeber has built many of his home but lives in a different area and thinks material should not be more than $60k. Does this sound right? Any help would be appreciated thank you.