Tub, sink, and toilet all clean, and very little stuff on the floor.

The majority of sinkholes are the result of debris being buried on a property when housed were built.Over the years as the debris decomposes the dirt above sinks in causing the holes.

Chandelier hanging above kitchen sink spliced into an extension cord for power. 3.

So I fixed a few gfci outlets and a new sprayer for the sink.

You'll lose that just in closing the property.I would suggest a live-in-flip/BRRRR with an FHA loan or save some money up because living with only 7k to your name and sinking it into RE is an uphill battle. 

For occupied units, apologize and thank the tenant for allowing to inspect their apartment, be very kind and DO NOT dig under sinks or open closets.

I had to clean a sink drain that was clogged from rice, long story but I did it myself in about an hour.

I think it cost $130.The P-Trap under the master bath sink was leaking, I repaired that.The dryer vents needed cleaning, I did that.The dryer stopped heating (it's an LG from 2014) so I called a place and they said they could come out and fix it DURING A WEEKDAY. 

Clogged sink.

I figure Insurance will be something ridiculous because you have to protect the house from sinking and additional liability insurance in case a guest injuries themselves or maybe even drown.