Then how much for patching this or that.

Most of the drywall has been replaced and/or patched throughout the house.

I only had to patch a tiny screw hole and replace towel bar anchors (the ones in the kit were pretty weak) from the last tenant.  

It's currently drywalled except the demo'd areas of wall and ceiling and the previous tub is removed. 1. framing and drywalling the closet and part of the ceiling2. installing a bathtub and either tile installation or prepping the walls for tile and I would DIY the tile itself3. tiling the floor4. install toilet and vanity5. prepping the kitchen floor for flooring install (will likely need to grind the concrete patches the old contractor shoddily performed +/- self-leveling concrete)Apologies for the long-winded post and I appreciate any advice!

I also received my first payment from my first tenant at the end of Nov (4 months after purchasing the duplex).Although things have moved slower than advertised and communication with the property manager still needs some work, I am hopeful that we are over the rough patch and I will actually start to receive some cash flow.

If I have to do a lot of patching and/or ceilings, this can add an extra day ($900) and if I have to do doors and trim I expect it to be a four day job ($1200).

YMMV (your mileage may vary)Fixable alone: boiler maintenance and steam system rebalancing, minor lead paint sealing, plaster patching (even very large ones), thermostat installation, insulate flooring and rim joists, painting, floor repair, skim coating walls, installing thresholds, weatherproofing, installing/refinishing door and cabinet hardware, adjuster gutter drainageNeeded professionals: sewage main unclogging ($), knob and tube disconnection+removal ($$), flooring ($$), adding joists for structural support within walls ($$), replacement and removal of old brass/cast iron plumbing where necessary ($$$), new gas line for laundry and lines for appliances ($), wall demo + replacement ($$$), steam line moving and radiator repair ($$), gutters ($$)$ - hundreds, $$ - thousands, $$$ 5K-10K, $$$$ - tens of thousandsHope this helps, best of luck with the old home!

Nah, just a bad handyman patching together a rental I'd say.  

San Antonio has a lower barrier to entry on price, Houston might be in for a rough patch with everything right now, but that could mean discounted properties.  

There is bad news around “The Oil Patch” and Saskpower has been decommissioning boilers.