There are multiple factors at play in determining your capital gains tax rate.

How do you figure out how much money you will pay in taxes at the end of the year on CF you made from your property. What is the percentage they use? I live in Illinois. 

Garrett Gunderson's/Wealth Factory has what's called the Cash Flow Index, it's helped us determine a credit card and loan payoff plan, and may be useful to help you determine your opportunity cost when it comes to paying down low interest debt or pursue an investment that may return a higher rate. 

I'd view the risk of the economy determining the payback date as a huge con.

Talk with your tax advisor to determine what the tax consequences are.

I’ve already identified the big market (city), now I’m wondering what research you do to determine if the zip code is desirable?

Market, neighborhood, cycle phase, asset type and class etc determine whether to flip or hold or assign or SF or LO. 

New loan around 248k...expected rent around 1650$-1700$,  new mortgage - 1210$ My question to ya'll...How do I determine COC on a property I've lived in and now want to make a rental?

Depending upon the status of your  Student loans (i.e. deferred, forbearance etc.) would further determine if any of would need to be paid off. 

I’m starting to look into buying land near a lake we love to build our home as well as vacation rentals. How do I research how many toilets can be on land? Is there a limit provided it’s serviced by a sewer? Right now...