For the last ~month, I’ve been building manual comps (both income and expense) for dup/tri/quads in a single market in the Midwest to underwrite my own deals.

The spa will also add to the expense of running the home, so you'll want to ask good questions about utlity and maintenance expenses, as well as booking history so you can make an informed decision.

Can I deduct expenses (utilities, mortgage interest, taxes, etc.) on a Schedule E for my 2023 taxes?

Consider factors such as the property price and financing, income and expenses, cash flow and return on investment (ROI), market trends and demand, future appreciation and exit strategy, and seek professional guidance.

@Antoine Martel Any idea about the expenses that are extra if I hold my properties in the name of LLC? 

And think of the wasted time.The average time to degree is approx 5 years now.

If the average monthly payment is $10 and they have 10,000 renters signed up, that's $100,000 a month or $1.2 million per year.

Long-term rentals continue to be one of the best wealth creation vehicles available to the average American. 

It's really not that expensive to get the NMLS licensing.

Overall it looks like you captured the key data, I would include a row with % for each expense to calculate off of so you can see what your assumptions are easily or change them.