I think you need to do your numbers carefully as Dubai is very expensive. Rents and property prices are sky high at the moment.
I’d be wary of selling your UK property to buy here. The build quality is not good, and you don’t see capital appreciation over time in the same way as the UK. Prices are high at the moment because so many people are moving here, but they keep on building and building so you may end up buying high and seeing a dip in value or waiting a long time for growth. In the meantime, you could get priced out in the UK when you need to move back (Dubai is not a forever place).
You can get a visa through property ownership at a certain level, and there’s also a remote working / digital nomad visa. Or you can start a company. You will need residents health insurance, which is normally provided by your employer. A good policy is expensive.
School fees at British curriculum schools are the same as private day fees in the UK. I think a lot of the schools are pretty average for what you’re paying for.
Office support / admin work is available, but tends to be done by Filipinos or Indian expats, so you may find your nationality is a barrier. Managers often like to employ their own nationality and there’s not the same discrimination laws here as in the UK. There is huge competition for jobs at the moment, UAE experience will nearly always be valued over international experience. And office admin salaries are low - around 4,000-5,000 AED / £800-£1000 per month, and minimum 45 hours per week. But at least you’d get a visa and basic medical insurance.
Feel free to DM me if you want more info.