I can put down 25% considering this will be a secondary home.Reason for considering SFH - No prior RE experience, Tenant Class, Newer construction - no existing problems,newer townhomes are priced starting at 420k$'s ( higher HOA and still has a shared wall) Looking at 4000$ max as monthly expense( mortgage+insurance+HOA+ Property Tax ).I say expense , assuming the residence is not occupied immediately (Vacancy) .

While it might seem like a significant upfront cost, properly addressing these issues now can save you from more expensive and complicated repairs down the line.Best of luck with your trailer house project, Emmitt!

Would it be possible for me to consider my down payment a business expense when I file my taxes next year and get a tax break?

I recently moved out of much more expensive home and renting it.

If i own a complex with multiple duplexes and have a seperate schedule e for each property listing income and expenses,  where would i report the expenses that cover all the properties?

Your place sounds like the first place I bought which was to live in and then rent though my rent did cover the expenses. 

I think it is the type of mistake that is made and how the accountant deals with you bringing the issue to him/her.I think the accountant should be doing atleast a bring overview of the documents / information that you provide.At the very least, when clients bring me their Profit and Loss, I try to see that they have the typical expenses that I would see for real estate investors and to see if the numbers make sense.

This trend suggests potential for long-term ROI both in property value and Rents Affordability and Investment Opportunities: Compared to the national average, the Lehigh Valley offers more affordable housing options.

My expenses went up $40/month.

When addressing dirt and damages, deduct reasonable cleaning costs and expenses for furniture repairs or replacements from the tenant's security deposit based on fair estimates and proper documentation.