I am cashflowing $100 - $200 a door, so I can only take so much rent reduction for these. 

In fact, since I've started real estate investment, I negotiate more and more things and in increasingly creative ways.I've had people ask for sometimes large reductions in rent and I've just politely declined, but if I couldn't fill the property, I would reconsider. 

Buyers always want 3% closing costs, a price reduction, and use their inspection report as a punch list, like they were buying a new house. .

you did good on your part,i got  hung the same as you a couple times.mostly when buying.so now when we buy we check out what kind of landlord i am buying from, a landlord who does not check out tenants.so what we do now is run the tenants name on the building we our buying to see if we would rent to them.if in no way i would rent to them.i try to get a further reduction in price i am  buying to cover my problems with his tenants .because he probably held the same problem ,that is why is sold to you.that is why we checkout as much as i can find out about previous seller.i hope this helps you on your next purchase.look as this as bump in the road.but i was as mad as you are now then too.but in time it will make a better buyer in purchasing properties.

I subtracted the repairs cost from the list price, and the agent submit my price reduction.

Basically you put $50K down and year 1 get $2000 back as principal reduction and $1800 as cash in pocket, for a return of 7.6%.