Hi @Sonia1562 , I think smart deadbolts are a must. I use Schlage and it allows me to assign a unique code for every guest (for security and their convenience of self-check-in and for me so no need to swap keys). I can also assign a date and time when that code takes effect and when it terminates. For example, if someone is renting from July 1-July 3, I set the randomly selected code for 2:30pm (for a 3:00pm check-in, just in case they are early) and then a termination time/date of 11:00am on July 3 (for a 10:00am check-out time in case they are running late). And I can do that all from my Smartphone wherever I choose to be. I can also open and close the door with a press of a button in case, for some reason, a new guest's code doesn't work. . . I can get them into the house and then figure out and fix the problem.
I hope this helps!
Michael