I like that Clarksville is a college town but I have read that rentals there greatly fluctuate with the military population.  

Likely fluctuates between 5-7% in my area, if that. 

The only reason we link accounts is to avoid the $25/month bank charge they apply to business/escrow accounts with balances that fluctuate below the $2000 limit as escrow pays out.

Tip 3: diversify your loans best  you can across asset classes you are most comfortable with and have a balanced allocation to help mitigate future market fluctuations.

Yes there is a little more risk with a HELOC due to fluctuating interest rate but if your current loan has low fixed rate and new loan would increase that it might be a better option. 

That will fluctuate with the price point.

AirBnB rules have not been approved, and those will be fluctuate too.

Real estate is pretty uniquely insulated from the fluctuations of the market at-large, so investing in other things comes with greater inherent risks, of course (plus you can re-fi out and re-invest depending on the circumstances).

If there is fluctuation in the real estate market, all of your equity can be wiped out very quickly.

Vaulted with David McAlvany was interesting as a gold investor as a hedge against market fluctuations.