Mine has a small battery that takes a few hours to charge and gets about 20 minutes of flying time.

I do not flip but if I did my long term health isn't worth any amount of potential money saved in the short term.I would just pay people to do all of that work.

Let's say they have no other deductions, like health care or 401K, and $2280 net - 950 rent = 1330/month to pay all their other expenses, or $332.50/week.

Not only that your employer pays most of your HEALTH INSURANCE premium so that helps. 

That the health department has been to the property and has been sending notices that have gone unanswered. 

An LLC is litigation protection from suits not covered by insurance (any alleged intentional fraud, gross negligence, health code violation, etc.).

In my day job I work in the health care field which I love, but...

These are people who have mental health disabilities.  

We told the owner that due to bed bugs we have health issue and are leaving the house, please pay our deposit back.

We know what is most important to them and the health of the business and have learned that insignificant trivial gifts do not enhance your business relationship and in many cases are viewed by tenants in a negative light.Not giving a gift has neither a negative or positive impact, giving a gift, aside from being unprofessional often backfires on a landlord.