Beside the thousands for furniture, you also have to pay all utilities, internet, cable tv, pest control, and buy linens and towels, toilet paper, soap, coffee, etc.

I as probably in a slow internet area.I’ve made offers based on a rent roll given to me along with expenses.  

Your question seems more like an internet search question to me.  

Before I buy my first property, I need to affiliate with a brokerage.

 :)   I would definitely recommend to set up a corporate structure - it allows you to write off all sorts of things... cars, car insurance, health insurance, life insurance, phones, internet, trips (oops...

- “Stalk” the sponsor online: Do some basic internet searches.

One thing I might consider when buying is the quality of internet available or bringing in better internet if available for the tenants. 

also what about internet?

I have found the biggerpockets network to be so helpful and am hoping for the same since a simple internet search in this field often leaves me scratching my head and doesn't provide enough information.

I would do that just to confirm your original projections and/or you may decide to use them, since they already have the highest ratings on the usual sites and they have all the moving parts in place (supposedly).Also, don't forget you need to provide all utilities for str's, including internet, cable or other tv service, etc.