And I choose locations where people would want to stay.is it risky to use a va loan then?

If the answer is "no", then by all means pay your mortgage off early. 

First 10 years is interest only, then after that you start paying principal/interest, but you can pay off the credit sooner and then as you pay it off you can invest in more deals once you get your other properties cash flowing to cover the debt service.

I'm constantly amazed by what the naive will spend for a program run by a marketing professional with limited real estate experience and then refuse to spend a penny with someone who has done it for the last 20 years.  

Plus he would get to learn developing a storage location and then could Scale if he wanted.  

But then there were some repairs necessary to pass an occupancy inspection, so the lease will have to be cancelled and redone with a new move in date. 

Then look up each company and vet them further based on reviews, time to call me back, etc.

(In other words, if it's too high, then I can cancel the buy and not have to lose any money)2.

Then you can read a more in-depth book like The Book On Rental Property Investing by Brandon Turner or The Unofficial Guide to Real Estate Investing by Spencer Strauss.2.

(If you don't do this, then this...)3.