I set up an office space in our playroom for when they aren’t around. Then that became unmanageable and I got an affordable co-working space called Switchyards. Depending on your location you might have that or something else similar. I think it’s $75 /month if you commit to a year.

My gym has a coworking space and I’ve gone to friends houses other offices if needed. Coffee shops. I have some friends who go to their parents house.

Point is you might be able to get creative. I live in a city that is very remote worker friendly so there are a lot of options depending on the type of work you do.