The problem is by taking guests who are choosing to flout all health advice against travelling (even if they say it's for 'quarantine') - means you are getting guests who are likely to have a disregard for rules and regulations generally including caring for your space.
Why not just offer your accommodation for local key workers - in this way you won't be encouraging travel which adds to the spread of the virus and helping out those in most urgent need of somewhere to stay. @Christianna1