ie -pictures, furniture, garden, etc.? I've been taking care of my mother for over 6 years. She has grown horns in her dementia state. I went from my 2- bedroom townhouse ( I loved it) to this 2 1/2 bedroom house. My things are still in storage because she wants nothing of anyone's stuff here except her own. The furniture in her house is over 30 years old. The house is falling apart, the wall paper is peeling, the cream carpet is stained. I've put thousands of dollars into replacing the heater, air conditioner, water heater, well pump, well water container, septic tank, rewired the laundry room, replaced the stove, etc. This house was built in 1942. My parents (father deceased) lived here for 32 years without changing anything.
I wouldn't attempt to bring into the home anything of your own as with dementia your Mom will start to constantly focus on items that are not hers, and this will go on for hours on end, day after day.
And you need to ask yourself, is this the dream house you always wanted? Some people love the older homes but only if they have deep pockets and a sense of humor as things will start needing repairing or replacing. You already had put in ten's of thousands of dollars for the repairs already needed in just 6 years.... your Mom should have paid for those items.
I am afraid what might happen is that your Mom would need another level of care, and if she doesn't have a lot of money then she might need to apply for Medicaid.... thus Medicaid would put a lien on your Mom's house.
FF is right, bringing in your belongings will cause Mom plenty of confusion. They do well at home because things stay stable and unchanged.
I thought of how funny it is that we offer so much of our time to our parent, but it is usually on their terms. You deserve to be able to bring your things in, but the old rule applies here -- her house, her rules.