Further, we need a way to track general apartment maintenance- for example renovating the laundry room, common areas, exterior and so on. 

@Leon Lee You might inspect the exterior for rotted wood, cracks, holes, anywhere bugs can get in.

At that point your likely opening most walls so moving a gas line to an exterior wall likely isn’t a big deal.

From what I can tell, probably needs a new roof and exterior paint. 

That's $20/mo, HVAC $5k over 15 yrs, Water heater 1k over 10 yrs, appliances, fencing, retaining walls, exterior paint, etc.  

Here is a summary of issues from the inspection report1) No roof vents for attic ventilation (this is a brand new roof barely 2 months old)2) Satellite dish is screwed directly through roof surfacing (this is a brand new roof barely 2 months old)3) Some roof coverings are damaged (this is a brand new roof barely 2 months old)4) Pull down attic stairs not properly insulated (not a bid deal, easily fixable)5) Missing or damaged soffit screens (not a bid deal, easily fixable)6) Mold on interior walls behind the kitchen sink (The kitchen was "rehabbed")7) Firewall behind the furnace was breached in one or more areas in the garage (garage was also "rehabbed")8) Exterior brick siding has hairline cracks (not a big deal)9) Exterior trim boards have gaps leading to water intrusion (not a big deal, easily fixable)10) Wood rot observed on one or more areas of siding (not a big deal, easily fixable)11) Noticeable repairs made to one or more areas of the ceiling (not a big deal)12) Wood rot on one or more areas of exterior doors (not a big deal, easily fixable)13) One or more privacy doors jamb when closing (not a big deal, easily fixable)14) One or more privacy doors do not latch (not a big deal, easily fixable)15) Windows have missing screens and damaged springs (not a big deal, easily fixable)16) Some windows do not stay open (not a big deal, easily fixable)17) Cracked double-paned window (not a big deal, easily fixable)18) Dampers are missing required clamps to prevent closure on gas log fireplace (not a big deal, easily fixable)19) Fresh air vent at chimney is loose at the wall (not a big deal, easily fixable)20) Wood deck showing signs of deteriorating in areas (not a big deal, easily fixable)21) Grounding rod near electrical meter is missing the required clamp (not a big deal, easily fixable)22) Latch for the main electrical panel is missing (Maybe best to replace the whole box)23) No antioxidant on aluminium conductors 24) No smoke detectors..

I am looking to potentially replace the subfloor and use vinyl flooring.Apologies for the delay.

They keep the common areas tidy and safe, as well as taking care of maintenance and care of common areas and exterior as you may know. 

Are the windows vinyl? 

I’m very interested in a DIY repair but this seems like a somewhat involved situation to open the ceiling and/or roof/exterior walls.thanks in advance