After doing my research, it seems like I will need to level the floor before tiling. My carpenter doesn't know how to it so I will have to get a contractor to do this job. How much would it roughly cost to level a 550sf floor in Chicago area? I will get a quotes but it would be nice to know the ballpark figure beforehand.
Here are some photos how the floor look.
My basement of about 600 square feet had vinyl tiles and carpet. I ripped everything out to install porcelain tiles. However, the concrete floor is uneven and wavy. The basement is a rental unit. Some of slopes are about 2,3 inches deep. It would cost me a lot for the self level compound like levelQuik ($36/ 40lbs bag that covers about 40 sq feet 1/8" deep)
My contractor has already installed the porcelain tiles in the kitchen. They show lippage but don't look too bad with wide spacer. I'm just concerned if they will break or come off later because of the uneven floor they are on.
If I don't level the floor and install the tiles anyway with either
will they lose adhesive or break and come off later? What are my options here?