Its a historically competitive market out there. 

Even if you cash out refi into say a 4 or 4.25% rate that is still historically low.

Inquire as to the status of the finances of the association, where they stand both currently and historically in terms of fees collection (this can show you whether they have adequate financial reserves in case of large future expenditures)-Whether the association allows the units to be rented out either traditionally or as an AirBnb if that is your plan-Make sure the current owner(s) are current on their HOA dues, otherwise you would be liable for the bill after closing-Some buyers ask for the minutes (notes) from all board meetings from the past 6-18 months to see what kind of topics are being discussed.

The math works out.If you are buying real estate and generating annual revenue, while getting a possible tax deduction on your schedule E after write offs, and based on historical trends your real estate is appreciating at 3%-5% per year. 

Contact the utility provider and get an historical average based on the last year of use.

If we consider historical trends, a massive correction is way overdue and buying right now is close to the top.

As @Bobby Hosmer mentioned above, rates are still historically very low. 

Investment Info:

Condo buy & hold investment.

Purchase price: $77,000

Cash invested: $77,000

Buy and Hold STR Property in uptown Butte, Montana in a restored 1899 building that was renovated by F...

I expect the rents to continue to increase faster than inflation for the next few years minimum because 1) the rents are still historically low to property value 2) the revenue increase has not fully compensated for the increased risk 3) fed has announced their intent to raise interest rates.  

It is not a foregone conclusion that accelerated depreciation is better for your income tax situation.You will need to look at your historical taxes and project your portfolio forward.