Tenant could not pay taxes and had to give him a break on rent. 

Borrow against them tax free if you need the cash.

Landlord friendly, low taxes, job growth, and close to all the recreation of lake Tahoe. 

Even with $0 down I may be able to cover the mortgage with BAH from the military but then I'm concerned about all the other costs (CAPEX, PM costs, regular maintenance, taxes, etc.).

All very helpful tips.

Where does everyone find taxes, vacancy rates, expenses, etc.

I'd add to that--depending on what you do with the profit and how you handle any taxes.  

And does anyone know if there's any tax we would pay, since we're selling at a loss?

We just started the process of creating an LLC so we can can track finances and submit for tax purposes.

These lines of credit generally have 1-2 year renewal periods and require you to send the bank your tax returns and possibly personal financial statement on an annual basis.In my experience "HELOCs" are associated with your primary residence.