avoiding using relays??

cheapness and simplicity and less things to go wrong.....

I was under the impression that use of relays made it possible to not have to run more and heavier gauge wiring

Believe me, you will be sorry you did that if you follow through with it.
It's not as simple a solution as you think it is, and I'm already picturing dim lights and a burned thumb from the switch as some of the results.