Closing costs seem low, but other than that the numbers look good.

Did you try to keep it low (under 100k-150k)?

paying off a house is simply trading liquidity for non-liquidity. you'll save yourself the compounding interest but that's at a very low rate.

What seems to be better deal a high cash flow of $670 in C class area with some minor repairs, possible major repairs in 5 years. like roof, maybe foundation issues. Duplex was built in 1900. Ne t option is lower cash...

Taxes may be a little low for this area - I know that in Palm Beach County, taxes would be more like $150/mo. 

I dont know your market...but $425 seems exceptionally low.

Just keeping a promise I made to the Almighty in 2007 when I said,  "Please Please Please get me out of this one deal and I promise I'll spread the gospel of low debt forever more" :)   

I know you should get 1% for every 100K your house is worth but since I have a low rate and dont have to pay any other fees maybe its worth it to hang onto it? 

Good low cost option.

. - I have taken 3 loans from my TSP (401K)- I cashed out my Roth IRA, twice- I bought three homes using low down payment mortgages and lived in them as my primary residence (FHA 3.5% and 2X Conventional 5%)- I used the BRRRR method and did a cash out refinance to buy another property- I saved every extra penny for years for down payments- I took out a HELOC I have experienced considerable appreciation in some of my earlier purchases and I am looking at doing a 1031 exchange.At the end of the day, I found out that I wasn't nearly as limited as I originally believed.