It doesn't look like they've moved much beyond ripping out the carpets, which is probably where majority of the insane smell problems came from. Tay said on her most recent stream that she went totally nose blind to the house until she was eliminated and got a proper shower in the ADU in the basement, only then was she able to smell the literal aura of funk that was emanating from her clothes from about a yard or two away. Nick was commenting on how foul the place smelled as far back as right after New Years, by the time the show ended it must have been insane, particularly when nobody was able to do laundry for nearing two weeks.
Doing a proper series on Youtube explaining what and why they're doing stuff and recording themselves renovating the house would have been a modest little bit of income though I can say that such stuff is really irritating when you just want to get in and grind out some hard labor, placing cameras for timelapse footage is a real pain in the ass.