Simple just get it for 15k less sometimes the easiest solution is the best LOL 

Ive used foggers before as a recommended solution by an environmental pro but it might not be the best solution in every case.

Fingers crossed am able to find a viable solution. 

What’s the most cost effect solution.

Either ask or find someone skilled.Communication, always and often.Weekly photographic progress updates.When you run into an issue have multiple solutions along with any cost impacts at time of discussion.

I believe the other two housemates would like to stay, so one solution is for them to find a substitute and allow the unemployed to move on. 

Make her understand that selling off multiple properties at once is no easy task, and then offer her solutions!

If you're doing a 50/50 split you need to be actively monitoring the costs/expenses.

@Eric F. that's a great solution.

Sellers at break even with their mortgage are stuck.This is a great solution for sellers who need to move but are stuck.