We need 3 years of financials for the building, a renovation budget, and a sources/uses of funds summary.I would start off by getting a YTD P&L from the Seller.

But if your just assessing deals then it's quite difficult to get the true numbers from any online source, database, or even county records... 

I just want to find reliable sites and sources to point me in a good direction as I am still new to all of this.

Just saw a episode of Judge Judy.. similar situation.. and yes,, the insulation needs to come out. you could get additional quotes,  remove brush, trash from exterior, any tree limbs that touch building, get exterminator in to bait and trap. next will be holes thru the ceiling from the rats.. any holes or vantage points on roof they are gaining access from, by A/C unit or vents that are damaged.. they are getting in some how and food source is active enough to keep them. 

Milwaukee Hard Money or do a search for "Hard Money Wisconsin' here in BP and you will see other potential sources as well. 

Drywood are swarmers and can be treated at the source by foaming agents.

However something generic would be better for when I add a new list source. 

I get the info directly from the sources. 

Private money lenders can be a good source.

With some more info I can give you better information.I'm assuming your 1099 income is your sole source or at least majority source of income?