I gave up work to look after my mum. Got Lasting POA sorted straight away. Got Mum assessed for Attendance Allowance, Applied for Carers Allowance for myself. Asked for day care for one day (so I could have a day off) Joined local Alzheimers Group, we go to their drop in cafe/ singing once a month and also their activities group once a month, we go on trips with them. I also joined the local carers group.
I thought of the situation as a business venture. The client (Mum) needed stimulation (the joining of groups) the worker (me) needed some payment, a day off, and a group of people for support and advice who understood what life as a carer was like. Also joining this forum, reading how others have coped with various situations.
18 month down the line things are going well. I give her little jobs to do folding things, polishing brass ornaments. I take her to garden centres, to the airport to watch planes, play games like Ludo, Snakes and Ladders, visiting National Trust Gardens - (this week we went to a teddy bear picnic).
We do things together but I also make sure I still get time to meet friends either when mum is at daycare or ask friends can they come our house.
I'm not saying looking after someone is easy (My Mum is like looking after a 3 year old) she is 84. But I don't feel stressed I take one day at a time.
My business approach might work for you? What would your "client need" in their new office (your annexe)