I’m not an expert on all digital lock brands, but I doubt that what you’re looking for exists.
There are plenty of reliable digital locks on the market. We use RemoteLock. Others use Schlage and other brands.
I don’t know what you mean by point 1. With a digital lock, each new guest should get a unique code (we use the last four of their cell phone). The code should have automatic start and stop dates and times, so that it opens the door only while the reservation is active. The guest can then operate the lock to come and go on his/her own schedule. And it’s best if the lock’s software interfaces directly with Airbnb as ours does. For that kind of interface, I assume that a subscription fee will always be required. Having that automatic connection makes managing the lock and the guest codes much easier.
Most of the digital locks I know of are controllable through wifi.
I’m not a tech guru, but my husband says this: If your lock doesn’t have a subscription to a lock service (as ours does through RemoteLock), then you would have to be able to access your own wifi remotely in order to control the lock yourself. What if your own wifi was down?
For point 2, I’m sure that all exterior digital locks are weatherproof.
And I’ve already talked about point 3.