If it was in the application phase I would handle it one way, but since he has a signed lease based on his application I am unsure what to do.To add to my concerns and time constraints, he texted me to say that they are arriving in town tonight and want to know if they can move in instead of waiting until Thursday.Any advice from more experienced landlords would be greatly appreciated.

I was lucky, I billed them and they paid it.In retrospect, I'd measure the tank at turnover, pay the departing tenant for their fuel that they bought (use that day's price, it's the only fair way and it's how it's done when you buy and sell and property) and then charge the arriving tenant.  

Monday rolled around and he told me he had made a mistake and there was just blockage in the line 15 feet under the foundation and that he had cleaned it before I had arrived (He was there for 30 minutes before me and had no access to the inside of the house).

In the meantime the other group called me Wednesday, I took a bunch of pictures and they said they'd take it sight unseen, they are moving here from Michigan and will arrive Monday or Tuesday.

I disagree with your statement of being able to collect rent on evictions but perhaps you have had more luck. if they are evicted, they most likely owe a lot of people $. if a check arrives in the mail, have a party otherwise, move on.

The neighbors called me and I arrived just before the police did.

They probably won't.Walmart Bill Pay Fee Schedule:Standard (Delivered in 3 business days)Fee: $1.00Next Day (Delivered next business day*) Fee: $1.50Express Payments (Payment notification arrives in 10 minutes) Fees start at $3.95Money Order Fee: $0.70

When John and I arrive at the court house and enter the court room, I was shocked to see how crowded the court room was.

Again, saving me having to wait around for them to show up with a moving van or for their flight to arrive "on time."

What is the very first thing you need to do when you arrive at the court house?