I'll give you a quick run down on the closing costs from a duplex I purchased for 250K:Loan origination charge: $750 (this may be 1% of the PP, however we went through a credit union on this one)Appraisal fee: $275 (I've seen this fee go closer to $600 on some purchases )Credit Report: $11Tax Service Fee: $70Flood Cert: $9Title Services and Lenders Title Insurance: $1,520Owners Title insurance: $271Government Recording Charges: $92Transfer Taxes: $519Your pre-paids and taxes will depend on how you set it up. 

Where do I report this on my taxes on Schedule C, and is there a need for 1098 or 1099INT?

Get a copy of your credit report and pay off some of the old ones.

The fire report clearly stated Operational Smoke Detector and Extinguisher were present. 

Based on the past 24 months of operating reporting that I have, it looks like the average expenses is $452/month (including the property management fee).

About two months had gone by and we still never got any sort of report or P&L.

Just like how your properties now effect your DTI - You would use the IRS for 8825 to report your income like you would on a schedule E and then it would be applied to your taxes depending on the percent of ownership.  

I can provide a property report with all significant figures.Does anyone have any feedback on how they've sourced their financing for mobile home rentals?

There often will not be a cost for reports like this if you let them know you plan to make some acquisitions and would use them for title insurance for your closings.

You might go to the library and check Consumer Reports magazine for a recent snowblower review.