As I'm sure most of you know, a long-term rental is simple since the only recurring expense I own is the mortgage, whereas with a STR I'll own the mortgage, internet, utilities, furnishings, cleaning fees, etc. which just makes my projections a bit foggier.I'm looking for feedback on the below expenses and wondering what else I should be thinking about, that I don't currently have listed.

I most definitely 2nd getting the utilities mapped first before digging.  

I can't think of a more extensive network of investors to lean on for advice than BiggerPockets.

There are strategies that you can utilize here that can make it easier as well. 

I start with cleaning and repairs, then I apply it towards utilities, legal fees, late fees, and rent, usually in that order.I also have a holdover clause that says the tenant is charged 4x of the monthly rent, prorated daily if they hold onto the property after lease termination.

Or, I’d have to get an extension of the closing date, which kinda defeats the purpose/competitive edge of a cash offer.

Negative cash flow is difficult especially on more extensive tenant turn overs or when dealing with a PIA tenant.  

Did they have bank statements showing utility payments for the rentals?

Once you have a shortlist, sign up for an account with each one and test them extensively to see how they function.

Instead, can you just cover the utilities or go to the laundromat.