In other words, you could give notice on the 3rd for the tenancy to end on the 3rd of the following month (or whichever day 30 days works out to be).The law is here:  http://dca.ca.gov/publications/landlordbook/moving...

If you do your homework, whichever route you take, you will be glad you did.

They have one year after receipt of that letter, or 3 years after the tax auction (whichever is longer) to redeem.

These owners would do well to do the same - though since they've got a PM, there's probably too much separation for either party to care as much as they should.Ultimately, it's true that the refund - if any - is up to the owners, nobody is going to force it (though if you've clearly documented these issues as they've unfolded with whichever platform you booked through, you might be able to kick up enough fuss to get something from them).  

The Lease states the following:This Agreement shall be a fixed-period arrangement beginning on April 1, 2019 [or a pro-rated amount on a per day basis if cleaning takes longer than a day-see addendum] and ending on March 31, 2020 with Tenant[s] having the option to continue to occupy the Premises under the same terms and conditions of this Agreement under a Month-to-Month arrangement [Tenancy at Will] with either the Landlord or Tenant having the option to cancel the tenancy with at least thirty [30] days notice or the minimum time-period set by the State, whichever is shorter.  

The only bad way to handle it will be whichever way leads to a bad relationship in my opinion.

It sounds like you are doing well financially, so regardless of whichever option you end up choosing, I think that you will be financially sound.

And whichever else topic might fit the situation.

As an operator of any business you are interested in improving/maximizing your net returns (whichever metric you prefer).    

The one thing I'd add is to put whichever tenant you choose on a month to month agreement so in case it doesn't work out, you both can exit the contract gracefully - or at least quickly.Good luck to you!