What brought my rents down there for a couple years is there was a ton of new developments in the area (yes development can negatively affect your property) and with the increased housing supply and new apartment buildings that went up, it pushed my renta down in that area.

Use rules as guidelines but remember Denmark is a different animal in regards to supply of houses, demand and a multitude of other factors.

I calculated the supplies to around 2500.

You want to look for similar options and see what they charge.If they are charging $1100-$1300 and have no vacancy you're in good shape, otherwise move on to another idea.So, to summarize a bit, this strategy works really well in areas where small apartments are in short supply and fairly high rents.

I just received the last month's billing (10 days late no less), and they put through several under 250.00 "charges" for cleaning supplies, which they stated as usual cleaning supplies, but's it's never been charged in the last 3+ years I've used them. 

I thought about references and it seems that's the way to go, I just wish I could find one that the wholesaler doesn't supply.  

Rochester, NY has a history of low vacancy rates and supply of well constructed buildings.

I also consulted sites like Home Advisor.com, and checked out prices at the big box home supply stores.If you send me your email address I will sent you a copy of the spreadsheet.

Plus in my personal opinion it is way too saturated and there will be less demand for rent in the future due to the massive supply. 

It's all about supply and demand and how much the seller values what the buyer's agent brings to the table.In the event where the company found you, engaged with you, then at the last minute you wanted to being in your own agent it's doubtful they would value what the agent is bringing to the table very much as they have for the most part already procured the sale.