It costs me $1,500 to evict a tenant with it usually taking two-three months.

You can later transfer the property to the LLC, but be aware it might trigger due-on-sale clauses or additional costs.

The total cost for this monthly for me is $1.00 fee for online payment for Sevier County, TN and the .73 cent stamp for Blount County, TN.

Your net gain is your net sale, minus your adjust cost basis.

What was the of the $8,000 annual bookkeeping costs between the software and the cost of the bookkeeper?

I started back when they were in Beta mode and free so I've seen them grow quite a bit.

Find one that can be custom to your needs, has flexible pricing, no long-term, high-cost memberships, and excellent customer services to determine how to best market to your leads.If you would like a referral code or more information please let me know :)

The carrying costs are low, but tenant was making partial payments by month 2.

If you're in Northern MN, there is a very good chance that the cost to build a new duplex exceeds the resale value, which would be an awful idea to build a new one. 

There are some very aggressive investors that refi into interest only products to free up even more cash in the short term - this can be much more risky though, so not recommended if you are not very experienced and have large reserves.