Don't approach, definitely stay as far as possible from cubs, don't leave food out. 

Problem is the second I do that I can kiss decent school districts and modern amenities (restaurants, movie theaters, stores other than the dollar variety) goodbye, plus some of these places would even be considered food deserts.

It ranks areas based on the following data points, obtained from the American Community Survey- Median Home Value- Median Rent- Median Household Income- Poverty Rate- SNAPS (Food Stamps) Rate- College Graduation Rate- Vacancy Rate Hope this helps! 

We always had food on the table, but the topic of money was a big 'no-no', later come to find out that we were just like so many other families out there just trying to 'Keep Up With The Joneses'.As for your sister, she's young, and I would think could be more of a visual learner.

If it's not in the condition you would want to see your property kept, don't rent to them.Second, in taking up front money, you set a precedent with them.

We have a small/mid sized group of local investors meet up every week anyone is invited to come for free, free food as well. https://www.biggerpockets.com/forums/521/topics/739100-am-mastermind-every-thursday-morning

It is called moving up in the food chain.

Consider this food for thought.. 

There is a grocery store nearby, a Dollar General, and a couple restaurants and fast food places within 1/4 mile.In the area (the other side of the park) they are getting $750 for a 2/br single wide and it is common to see $200/$250 a month for lot rent.  

You have to be careful to as you might have to add a fresh air intake.