I bought a home that has been vacant for 9 months. The owners left 10 cats there that used the rugs as a litter box (also cat spray on the walls.) It's so bad, that we pulled out the (very nasty) rugs and padding but the urine has gone into the sub flooring. I bought Natures Miracle, applied to coats. Still stinky. I was thinking of applying a coat of Binz Primer to walls and sub flooring then applying two coats of Kilz Original, then pain and put down rug and hard wood floors in kitchen. Can anyone tell me what I should or could use, oil based, latex, what goes on first and will keep the smell away so I can actually move in!I can't afford to put down new sub flooring. Please help!

Thank you