We want to finish our (currently unfinished) 800 sqft basement. The current floor is concrete, in good condition, but slopes substantially toward a drain near the middle of the floor. I'd guess the difference between the high and low points is about 2-3 inches.
We are planning on hiring a pro to do this work, but all the companies I've reached out to say they don't do this kind of work. Self-leveling concrete would be very expensive for this volume. Another option would be laying a wood subfloor over sleepers or something, but we want to keep as much of the height in the basement as we can. I've seen some suggestions to use deck mud, but can't find much info.
What's the best option for leveling the floor so we can lay vinyl flooring over it, and what kind of contractor should I be looking for?