Since you are not in physical possession of the card you will not use it. 

Your sister is a leach and needs to be physically removed from the property by family to help your mom.

USA         LA Total, all occupations 100.00%        100.00% Management  5.1 5.4 Business and financial operations 5.2 5.8 Computer and mathematical  3 2.5 Architecture and engineering 1.8 1.5 Life, physical, and social science 0.8 0.8 Community and social service 1.4 1.6 Legal 0.8 0.9 Education, training, and library 6.2 6 Arts, design, entertainment, sports, and media                   1.4 3.8 Healthcare practitioners and technical 5.9 5.1 Healthcare support 2.9 2.3 Protective service 2.4 2.7 Food preparation and serving related 9.2 9.4 Building and grounds cleaning and maintenance 3.2 2.4 Personal care and service 3.2 3.2 Sales and related 10.4 10.1 Office and administrative support 15.7 17 Farming, fishing, and forestry 0.3 0.1 Construction and extraction 4 2.5 Installation, maintenance, and repair 3.9 3 Production 6.5 6.3 Transportation and material moving 6.9 7.4 https://www.bls.gov/regions/west/news-release/occu...

Not including things like physical property inspections, septic systems, area survey, etc. what else must I know before proceeding?

I really appreciate all the advice that you have written and I appreciate all the time that you have put into writing such a detailed response, as I know how long it can take a while to write something as detailed as your post.Networking is such a valuable skill and I am working on how to expand my horizons, and actually getting involved in the physical world rather than sit on my computer and trying to learn.

How throughly do you physically inspect properties that you arent able to gain access to the interior?

2 of my sister-in-laws have that - a teacher and physical therapist.One nasty thing about student loans is how they look on your credit report.  

If rent is not paid physically at a branch (i.e. it is paid online or via bank transfer), the date of payment will be considered the date when funds reach our account.

@Colin EasterbrookThe pros include the following:A way to diversify outside of the stock market.Real estate is a physical asset so it generally won't disappear like a stock.All rental income flows back to the IRA so it could be a steady way to grow your retirement account. 

Do you physically visit the property or DDo you use rental manager