[quote=outtamojo]
Yes, do not skimp on leveling the floor. If you do, seams that were perfect when you locked the planks together will open up later if your surface is uneven. Also, your baseboards will have have dips and corners will be difficuclt to join.[/quote]
You just need the floor to be flat, getting some of these slabs level is more work than it’s worth. I rented a concrete grinder to smooth out all the left over thinset but didn’t realize my subfloor wasn’t very flat. It looked to be ok with my 6′ level but I realized I still needed more work. I was able to get some people from G&A Sanding to come in and get everything nice and flat for the same amount it would have cost to rent the concrete grinder again.
Back on topic, you might want to look at installing the flooring yourself to save a lot on money. I just did the tile and bamboo flooring at my house for the first time. I did a glue down on a concrete slab and it was fairly easy, much easier than tile. I was working with 6’x6″ planks so I would think the smaller, lighter laminate pieces would be even easier. If you’re going to float it, it should be very easy if you’re working on a flat surface already.