Teams are made up or more than just developers. Testers and Busines Analysts can share invaluable information with developers and vice versa; each team member should be involved in each phase of the SDLC
Don't reinvent the wheel. Software developers already use shortcuts to be twice as productive, so taking time to integrate best security practices into everyday development should come easy.
Why waste time when you can automate! Automated testing and deployment have so many ancillary benefits that you will wonder why you didn't start earlier.