Think of all the things that could go wrong and see if the lease addresses them: unauthorized pets or tenants, early termination, security deposit, lease violations, late rent, eviction, lawn maintenance, parking, etc.5.

They found mold in the kitchen duct, lots of junk and dropped food down in the vents, etc.

Also make sure to have first month rent and security deposit up front. make sure they know no smoking or pets. 

Take the ad down for a couple days, then put it back up at $1,300, allowing small pets.

That could look at property to give me a quote on food ?

These type of properties also fall under the SFH guidelines, which you're qualified for - food for thought.

I then charge a $300 pet deposit and a $50/month pet fee.

You're probably going to find that you spend the most money on housing, followed by transportation, followed by, at this point in your lives, food.

Perhaps a roommate can cover food, utilities, trash, etc instead of rent?

That will make two pets in my rental unit.