Bay area - new const

[Sid N.]

I have been a RE investor last 7 years and have built up a sizable equity in my properties in bay area . Want to cash out now to pursue other real estate investments .Buying for face value does not make sense any more in this area because of the appreciation . as a result i am looking into alternative ways . Buying land and constructing looks to be attractive play to me . if real estate corrects by 15-20% then all i am losing is the 15% profit margin assuming i have assessed things accurately . What would be the best way out ? I know i can go to county and ask for the zoning but I also have a day job . Can I have a builder/contractor do the ground work for me ? has any of you guys done this before on the side  . numbers don't work out for me going full time , i can spend 15-20 hrs per week on the gig . looking for your expert advise .