I agree nothing is structural and even if you don’t have much experience, there are enough Piggs on this board that have used quality people that I think you can just do it yourself.
It’s fairly easy as long as you are using good people. You can save quite a bit of money yourself. I’ve done several renovations on my house and even for the materials, I’ve often times ordered the parts myself on Amazon.com (sinks, faucet fixtures, etc).
You can go to places like Surfaces USA on Miramar Road and pick out your own granite or marble and pay for it with no mark up and the contractor can go pick it up directly.
Renovations that aren’t structural aren’t too difficult. I do agree a GC is a good idea when it’s a bigger job.