Understand the fees involved and calculate the total cost for an entire year of management so you can compare the different managers.

Other than cap rate and cash flow, what other metrics/calculations do investors use to determine whether or not a property would make a good rental?

No cut and dry calculation for it. 

Here's my #1 dissatisfier in dealing with agents: Most have NO idea how to evaluate investment properties.I HATE when agents bring me a so-called "deal" without having first determined whether it actually makes sense financially.Then, when I do run the numbers and calculate a cash flow of $50/mo and a cash-on-cash return of 3%, I feel violated, like my time has been totally wasted.And, that's the last "deal" I'll ever consider from that agent!

That's how we calculate our bottom price. 

Use the STR calculator here on BP to see if it a lucrative market or over saturated and too competitive to make it without using a bigger platform to host it. 

The ARV % serves as a secondary calculation (i.e. constraint) on the maximum loan amount for a rehab project.

For example, divorce buyout calculators can help you estimate how to fairly split equity.

Utilize tools like BiggerPockets Self Storage Calculator for competitive offer terms.

On 4 it is $12,000/year.  3.3% depreciation is similar numbers - usually almost eliminating all your taxable income from financed properties after repairs and maintenance is factored in.