Let a partner, a colleague or a bookkeeper into your portfolio.
If an assistant, a business partner or your accountant helps you run these properties, give them their own login rather than sharing yours. You do it on the Team tab in Settings.

Invite someone, and you choose what that person can do. Every action is then recorded against their name, not yours, so you can always see who did what.
People are free — you are charged per property, however many of you there are.
When they accept, they set their own password and see only what you have granted.