You are required to report any income you receive from Whimsy Properties on your tax return.
Whimsy will send you the corresponding summarized tax disclosure form (specifically a 1099-DIV) for your investments you earned income on by the end of January of the following year, so that you can file your taxes appropriately.
Investing in states that you don't live in will not trigger additional tax filing requirements. Any relevant state taxes would be based on the state where an investor files their tax returns, not where the property is located.
Whimsy does not not provide tax, investment or legal advice and only shares the details to how the Whimsy business operates.