I own the property free and clear so the only annual deductions have been maintenance, repairs, taxes, depreciation. 

Who do you call for repairs, to place 3 day notices, walk throughs ect ?

Even after you have title, if there is a redemption period in that state, then you want to wait until the redemption period has passed before you make any costly repairs or upgrades. 

Like the other posters have mentioned the credit score / credit report is likely an issue - with what you describe there certainly seems to be some stuff missing for it to be that low - but on the flip side, it could be a situation where professional credit repair could make a relatively quick big improvement.

The house will stay in my father's name for now, so we want most of the repairs to be paid by him for depreciation purposes (he will be doing cost segregation and taking bonus depreciation later this year).

The ARV or "After Repair/Renovations Value" to see how much it will cost to renovate and what it will be worth after the fact.

Since it sounds like just a handful of locations, I would experiment with some repair strategies.

-repairs and cap-ex can be the most challenging aspect for new investors, there are no standard rates that will work across the board. $200/mo is a safe bet for a SF of this size for cap-ex, and your repair estimate looks ok.

For them, there was very low risk, because they knew how to gauge the after-repair value and set terms in their favor. 

Doing my first few repairs on my third door, 🤞🏽 I can stay on budget.