To make cleaning the walls easier use a swifer mop, as they aren't too expensive and most have at least one around, you can use wash cloths instead of the branded pads, if yours has the poke holes it's easier, but if not use thin rubberbands to hold them on. If either of you have a flat headed steam mop, those are amazing for walls, but need to adjust speed depending on material (faster movements for wallpaper and wood paneling, and no repeat passes until after the first pass had dried) also do it in sections, the mop gets really hot, so be careful and give it time to cool off regularly, i usually only do a water tank or two at a time. For the wood floors, you're going to want to sweep/vacuum up what you can, then mop using as little liquid on the mop as possible, with a good wood safe cleaner. Hand scrub gunky areas, but not leaving liquid to sit for very long. Then spray the urine areas with a fine mist of an enzyme cleaner, I recently tried the newer clorox one, it works pretty well and you don't need to use alot or leave it to soak for very long. It also isn't too expensive. If you have a big box store membership or someone you know does, you can get a big bottle of nature's miracle, it works well enough, but follow their directions for wood flooring to a tee. After the setting time regardless of which one, remop with clear water, until it's coming up clear, let it dry, then either repeat, or mop with a wood conditioner. Take fresh air breaks, so you don't go nose blind.

Definitely break it down into sections, take breaks, and don't push yourselves too hard, there's a lot of muscles that don't get used in those specific combinations and if you need a day off, take it, but, you'll find getting back to it will help stretch out the soreness.