Personally, if you brought me a deal that met my criteria, after your assignment fee was baked in, I wouldn't care if your assignment fee was $50k. 

I don't really care whether the back right burner of the stove doesn't work or there's some water damage on some joists somewhere. 

If the $783 does not include P&I, then it gets cut almost in half to 440...now things become quite tight and risky. 

You are also amortizing the loan over 20 years instead of the more traditional 30 years thus cutting your cash flow more.On a side note the tax assessed value makes little difference to the actual value and if you try to negotiate based on that your offer will likely be rejected.

My thinking is that there is room to raise rents, perhaps screen for better tenants that take care of the place and decrease the maintenance cost and get the NOI up above $100k/yr. 

You'll just need to find the balance of giving amazing and caring customer service to those sellers in need along with remembering as an investor, you are a business and you will need to create a win win situation for both you and the seller.

I disagree, I care about the likelihood of actual closing.

I like to have a property manager to take care of the day to day.

I have a taxpayer that wants to redeem basically I have cut the grass a couple of times and sprayed the yard with Permethrin poison to kill the fleas and roaches and ants and other bugs and have cleaned up the property extensively because there was trash everywhere and it was kind of overgrown how do I charge for this if I'm charging for the value and not the cost

I'll just cut and paste it here:"There are two main ways that house flippers are able to overcome the (very real) problem that most renovations don't increase the value of a property by at least 100% of the cost of the renovations:1.