@Sophia. A good host should stay at their property in all seasons to know that needs attention for a good sleep.
In addition to your ideas and the assumption that all beds should have quality mattresses for a good night's sleep I'd add:
1. In warm weather ceiling fans that can run 24/7 silently and operate via remotes so you dont have to get out of bed to adjust or turn off the lights
2. Quality flyscreens on all doors and windows to keep out the pests
3. Combination blockout and sheer curtains and blinds or shutters to vary light
Its still amazing to me how the basics are often overlooked by hosts.
Happy hosting everyone.