Yes. I’ve done this. Get a cleaner, get everything delivered, be rigorous about writing everything down, prioritise and see every five minutes as an opportunity to get things done. Multitask where you can, but one mentally taxing job with one basic or physical- eg I do leg raises and crunches as I type, it takes no thought or effort and can do them quite easily while giving 100% concentration to my work.
I used to get up before six, push a wash on, prep dinner (whilst doing squats/balance work) clean every surface, iron, load up the computer, do admin for the house etc so that by 9am I had one or more meals prepared, and was ready to go. For me, a clean house helped with being able to focus more. That way, I could work really hard until late at night.
You have an end date and this should mean that you don’t burn out. This is important because you will start feeling stressed at how much you have to do. My trick when it felt overwhelming was to say “one foot after another” and make a list of all tasks and dive into the first. Life is just made up of a series of tasks that we do. Give yourself praise and encouragement and self reflect on your performance. Assess what you are doing well, how you are managing your time and whether there is anything you could change or do better.
m Also, take at least 15 minutes a day to talk to friends and family otherwise you will emerge after six months completely isolated. Do workout, you need physical strength and stamina to work that many hours.
We forget how many hours we spend relaxing generally. You will be working those hours but it is only for a limited period. Outsource everything you can, focus on the goal.