It's also possible there's an addendum to the Trust changing that provision which contacting the other Trustee's should identify.Assuming there's no exception in your title policy for problems with the Trustee's conveyance, if one of the other Trustee, or even a Beneficiary of the Trust, claims the signing Trustee either did not have authority to convey or exceeded their authority, the claim should be a covered matter. 

As to funds - what's the worst that can happen that won't be covered by insurance?

And how much is covered by insurance.Mike

You have a tub with jets, a heater, a pump, a control panel, and a cover. 

Quote from @Varun Chawla: The insurance is very cheap at 10-15 a month and says it covers up till 10k.

It should cover things like:Pet type, breed, weight, and number allowed.Tenant responsibilities for waste removal, noise, and pet behavior.Provisions for professional cleaning upon move-out.Indemnification clauses.Need a Pet Addendum?

.$100 covers up to 2 small to medium sized dogs.I make a couple thousand per year in pet fees.Never had any pet damage.I'd say about 75% of our renters bring a pet.

It protects their belongings and gives you another layer of liability protection.Calling your insurance provider and explaining the situation will help make sure you’re fully covered.

This pretty much cover all the maintenances.

3) If the STR income isn't covering the mortgage & HOA, how is pulling more money out, thus increasing your expenses, going to help?