*The cap ex is only so low because there is no garage, fireplace, pool, washer, dryer, garbage disposal, the windows are small and single pane, only one door per unit, no real landscaping to upkeep, they are entirely brick,  and there’s a metal roof.

It will depend on what shape your property is in as to what you may have to do, you can always have the tenant inspection report come back with more things than you are willing to fix and refuse a request for repair, but that could put a strain on your relationship with the tenant if they continue to live there. 

Talk about losing relationships, investors may lose relationships with a few colleagues, I know guys who have strained relationships with family due to money issues from bad business deals or BS from investors...

The issue with TK is that when you only cash flow $100-200 per month you are inherently putting yourself in a financial strain in the event something goes wrong.Being able to only net $1,000-2,000/ a year is making everyone else wealthy except the actual investor/risk holder.

It may be a standard size pane of tempered glass and less than replacing the door...it isn’t both doors, is it?

It is also likely there is no vapour barrier - and if there is, it's almost guaranteed it is not fully sealed.Windows, if original, are most probably built in-place with single glazing (no thermal panes) and no gaskets or weather stripping {read: they probably leak).If the electrical has not been updated, you very likely have ungrounded wiring, though it is possible you may have early grounded (NMD-3).  

When we pull permit for the additional bathroom, inspector delay signing due to some minor things like incorrect pipe material for the bathroom, electrical sub-panel is not up to date, central air heat certification needed, etc...

We loved the challenge and process but we decided that we couldn't do another if we were both still employed FT...just too much strain on each other.

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If you simply replaced a broken pane, that might be more of a repair than capex.