@Teri1105 Are you planning on renting long term? Or will you have guests of less than 7 days?
Treatment of your spa should be determined by how often you change guests. We have hot tubs, and they are emptied, scrubbed, refilled with fresh water and chemically treated at the changeover of every guest, along with the other turnover tasks. If you have a long-term guests, then yes, you arrange with that long term guest for the treatment of the spa on a particular day each week. IMO, unless the spa can withstand neglect or misuse (as you are no longer also at the property) you may want to consider removing it.
Small safes for valuables are useful. Some guests may have difficulty with remembering the code that they entered and may lock themselves out of the safe, requiring you to arrive (on demand) with the override keys. I found it beneficial to have a safe where I could set the code on the safe with the same code the guest received for the door access; usually their phone number.
If you have other maintenance services like lawn care that come on a scheduled basis, include that information in your listing, in your welcome letter to the guest, and in your property guide.
In the event that a guest contacts you about a maintenance issue that requires an outside contractor, be sure that the conversation with the guest where the guest agrees to the contractor being onsite is on the AirBnB platform messaging -- not phone, text or other app.
