The cost of materials is continuously fluctuating, and can vary quite a bit by market, so any tool or estimator won't be up to date or accurate. 

@Ethan GidcumbWhile macro trends may be helpful, I think real estate is a very regional based market where prices can fluctuate a lot when comparing state to state or even neighborhoods within states.

So I have fluctuated from telling them a few canned answers.

Other property owners may be vying for the same renters, which could lead to lower occupancy rates and less rental income.Seasonal Fluctuations: The rental income for a short-term rental property in a beach area may fluctuate seasonally, with lower demand during off-peak seasons.Maintenance Costs: Owning a short-term rental property requires regular upkeep and maintenance to keep it in top condition.

However, when you are running your numbers, I would make sure you are using a higher interest rate for post refinance than whatever you get into the deal at due to fluctuating interest rates.

The number of doors greatly smooths out any fluctuations / issues that may come up.  4% vacancy is great, but you can't realize 4% with one door.  

Let's break down the pros and cons of investing in a vacation home for short-term rental versus a single-family home for long/mid-term rental, and the potential impact of each decision over a 10-year period.Investing in a vacation home for short-term rental:Pros:The potential for higher rental income during peak vacation seasonsThe opportunity to use the property for personal vacation timePotential for tax benefits associated with owning a rental propertyAppreciation in the property value over time due to its location near the beachHigher nightly rental rates for a vacation home compared to a long-term rentalCons:Seasonal fluctuations in rental incomeHigher maintenance costs associated with short-term rentalsPotential for more wear and tear on the property due to frequent guest turnoverHigher cost of entry due to the desirable location near the beachMay require a property manager to handle guest turnover and maintenance, reducing profitabilityImpact over 10 years:If you invest in a vacation home, you may see appreciation in the property value over 10 years, particularly if it is located in a desirable beach area.

STRs can potentially offer higher returns, but they usually require more hands-on management and are subject to seasonal fluctuations.

Long-term equity will stabilize and grow but in the short term we're going to see a bit of fluctuation because of the interest rate increases the Feds are doing. 

In general STR's fluctuate a lot over the year.