SSR TI design: Combing the TIDA-01574 and the TIDA-01065 into a one design solution

Hi, I would like to know whether the TIDA-01574 and the TIDA-01065 can be combined into a single design solution? 

1. In the TIDA-01574 design, the power loop is completed using the W wire. Can we use the Y or the G wire instead?

2. What if the C wire is available, can we connect to it instead and does that mean that the device can draw power from the building 24Vac line all the time? Would there be design changes needed in this case?

For the TIDA-01065, can we copy the single relay design and replicate it to four relays?