Offer not just vacation homes but homes that are big enough to have 6-10 people co-working and co-living.
Instead of having 4 families splitting a house for 3 months, every participant has the right to live in the house or to rent it out.
Create a market for them so that they can trade their shares. Make it easy for people to sell their shares for co-owners.
Make it international, focusing on places that are reasonably developed and with good climate: southern Europe and the Caribbean.
For the past 5 years I've been unsuccessfully trying to convince my very risk-averse wife (civil engineer) that digital nomads are going to be an increasingly powerful market. If you are willing to do any of that, let me know so that I can quit my job and apply to work with you. :) If not, please let me know what problems you see with it. I've been thinking about this for quite a while and the pandemic made it even more appealing to me.