Are there any benchmarks in relation to property management that I should know and hold my PM to?

I've heard the standard $100 per door discussed as a conservative benchmark but just wondered everyone's thoughts on that, especially as it scales from 50 units up to 150 units or more.

Find the best deals and then compare them to the benchmark.

What are some favorite metrics/benchmarks in the long run -- long term buy and holds with fixed loans and no mid range thoughts of selling , re-financing etc.?

All high-ratio mortgages must be insured, either via CMHC or one of the two private insurers.Similarly there are two sets of guidelines for qualification:  High-ratio borrowers :Mortgage qualification is based upon the Bank of Canada Benchmark 5-year Conventional Mortgage Rate (V122521) - which is presently 4.64% [Note: This is also known as the mortgage qualifying rate];Maximum amortization is 25-years;maximum purchase price or "as improved" property value must be "less than" $1,000,000;borrower's gross debt service (GDS) "less than or equal to" 39% (CMHC prefers "less than or equal to" 32%);borrower's total debt service (TDS) "less than or equal to" 44% (CMHC prefers "less than or equal to" 40%); andproperty must be owner-occupied.Low-ratio borrowers:  If the lender bulk-insures their portfolio, they must qualify applicants using the the same rules as above.  

I would love to have some benchmarks and ideas.

Over the years, I've self managed my investment account through purchase of value stocks have outperformed by benchmark (S&P 500) over the long term.My interest in real estate is to get my money working for me in a new way.

Are there helpful benchmark estimates of the costs of things like: a new roof, walls, floors, etc.?

6 months per door is my benchmark.

However, a landlord should have reserves, preferably half a year worth of PITI.When you evaluate a deal, it is always helpful to have a benchmark.