In theory this makes me a nice little profit, even after paying all my borrowing costs and selling fees.Is this realistic?

The house initially appraised at $250k but on Jerry's recommendation I sent the appraiser more realistic comps and some of the upgrades that were done.  

I have not seen your home but I suspect planning for $1150-1250 range is more realistic.

What type of costs would one expect for a 1600 sf house (I understand it will vary, but is there a realistic scenario where it will cost me 10k to fix, or could I budget 5k and most likely be alright)?

@Brian Garlington Dallas has a booming economy with great job and population growth but because of some of the highest property taxes and insurance rates in the nation, the returns are very low in comparison to Midwest markets like Indianapolis and Kansas City. 13-14% return are not realistic however when you take in to account vacancies and maintenance which a lot of people neglect to include.

In order to answer all your questions throughly one would really need to know your personal finances and realistic goals.

great post. well thought out and realistic numbers!

Are any of these applicable/realistic or should I look elsewhere?

All deals come with a mock settlement statement complete with repairs, closing costs, holding costs, and a realistic ARV...never inflated.  

I felt people were passing it up because it was listed since August, It started over priced and their latest reduction was a more realistic price.