Also make sure you get the security deposits from the landlord at settlement.

@Anna SmithRecommend you reach out to @Daniel Hyman who regularly assists military families, nationwide, with real estate investments

You should find a rental you can drive to and buy it with your regular non IRA funds.  

Even people who can still afford to vacation will find a less expensive/more accessible place to go.Or, as @Lucas Carl mentioned, large properties designed for groups will probably take a big hit, as it'll be harder for all parties to spend the money to vacation together.I feel pretty secure with mine.  

Pennsylvania has a big logistics industry, Ohio can offer strong cap rates. it honestly depends on the investor, what they like, the industries they believe will support the security of their purchase, the distance you are willing to travel, the amount of passivity you want in the investment you make etc. 

I was just trying to think outside the box as someone who wants to retire in 15-17 years and would love to have the security of a fixed rate loan that would presumably be paid off when I retire.

Would my available cash, good credit and collateral be enough to secure a bank line of credit?

I am fortunate in life, inherited some funds, an watching them barely outpace inflation, all tied up in securities. 

For example, you buy the place and the tenant could claim the Seller allowed them to paint the walls black or that their security deposit was twice what the Seller claimed.

Proactive management with plans for tenant retention, regular home inspections and check-ups.