New home has leaking/cracked tiles on terrace built over garage
We recently purchased a new home. We moved in approximately 3 weeks ago, this house was a foreclosure. We have a rather large 16x18 tiled upper terrace that is built above our lower garage and mudroom. We knew that some of the tiles were cracked. However, since we have moved in, we have found out that this upper terrace seems to be leaking water into the garage and mudroom directly below it. I have found evidence of water stains and maybe even mold on the garage and mudroom ceilings. We have siliconed up the cracked tiles, but it doesn't seem to be helping.
I am posting a link to the terrace to show photos.
We don't have the funds to hire a professional to repair this project. We have contacted 3 contractors and all 3 had different idea's of how to repair this properly.
What are some options for fixing this, short of pulling EVERYTHING up and redoing it all. We do not know the damage below the tiles, or the extent (or lack of) damage below.
Is there such a product that is like a very thick sealant for tiles that we could coat the entire patio with to protect from any leaks? We do not know where the leaks are coming from.