We spent the last 2 days doing massive plumbing "repairs" to old galvanized supply lines with one shut off for 7 units.

Which suggest there is just a structural lack of supply of affordable apartments.That's what I see in my market.

Although I am too young to buy my own property I'd love to jump in a gain that crucial hands on experience that no book can supply.

Items like the broken blind (that you supplied) are appropriate to bring up then.  

I have an addendum on the contracts that says my tenants are responsible for maintenance of certain things (replacing HVAC Filters every 2-3mos, Refrigerator water Filters, Light bulbs... especially Garbage disposals)... of course, I will supply the materials every year (bulbs, filter etc.)  

Probably won’t find a better hml rate though....most HML’s don’t have an endless supply of money like banks do, the smaller ones run out of funds occasionally.

They get damaged/dented stuff all the time and sell construction supplies as well. 

Greetings, i recently purchased a home that currently has an HVAC system in the attic with supply/return vents though out the home.

It's something to consider alongside the market's growth rate and the amount of new supply in development.

You have no way to prevent this.If you say the structures are not less desirable than the surrounding area structures then supply/demand will quickly drive prices way up.