Please do not take offense - It really sounds like you need to get your priorities straight. First it sounds like you need to make sure your house doesn't fall down You probably have a leaky roof if I were to guess You probably have a lot of exterior maintenance like rotted window frames, etc. Tell me I'm wrong.
So - First make your house structurally sound. Then weather tight, then fix the aesthetics. Remove the fireplace if its a safety thing. Do not use it unless its been fixed properly.
What I would recommend for you. Please take my advice, it will be well worth it.
Hire a good home inspector or a good general contractor. Pay them to do a top to bottom inspection of the house. Ask them to note all the problems, and potential hidden problems. Then ask them to prioritize them for you, most critical first, on down. Pay well for this. Use this as a road map for your renovations as you are able to do them. Do not waste yours or anyone else's time buy getting free estimates on fixing a chimney when there are likely other priorities. I have paid to have this done for a family I was helping. They had asked for some help with a new tub (Aesthetic repair). When they also had roof leaks, water in the basement, crumbling front steps, rotted windows, etc. I helped them get their priorities straight and they are doing what they can, as they can.
What's the expression? Its like arranging deck chairs on the titanic. Or, Its like fixing a fireplace on the titanic!
Good luck