> If I'm price-comparing hotels, and I see one that's $100/night, and another that's $75/night, I know that the cost may be higher due to taxes, but it will be higher by the exact same percentage for both of the hotels.

1) IMHO this doesn't help. If I don't know what the taxes are, then knowing that they will be similarly high on either transaction doesn't help me with budgeting. Just like it's hard to know if a $75/night hotel is within my budget without knowing the size of its resort fee, it's also hard to know if it's within my budget without knowing if the tax on it is 8% or 18%.

2) FWIW this varies by county, so it's easy to have two hotels that are a mile apart but with different tax rates. To pick a random state, here is an old table of hotel taxes in Florida by county: https://www.floridasalestax.com/florida-tax-law-blog/2015/ja.... These taxes vary from 7% to 13%, so if you're picking hotels next to a county border, the difference can be noticeable.