Thanks for checking back in. It's always good to hear an update on a previous discussion. Sorry to hear about your skin problem, but i doubt that is caused by mold. If so, there would be many, many more people with skin problems. Hey! But I'm not a doctor and this isn't a medical forum........

Costs for a bathroom project are hard to estimate here because labor costs vary so much from area to area. And even with this whole thread, we could not guess at the scope of the work. You will need to get some estimates from local contractors. With those numbers in mind, and based on what they tell you, folks here may be able to help guide you in the right direction.