Will Barnard thanks for your input, it's valuable for me because it's good to know that there are variations in the market, as I was finding the 70% rule worked in some markets but not others and I thought I might be factoring something wrongly.

There can be times when some variation to these is required due to the uniqueness of a various market or property.

I've seen wide variation in prices on Trulia and Zillow, that don't reflect actual value.

The biggest is that any retail appraisal would have a large variation in potential values and may not have any relationship to what a retail buyer might pay.

Reading then Hands-on because variation can come up, you enjoy the variety of tasks and challenges found in property management.

There are many variations of compensation structures.

It's basically a variation on using 1031s to diversify (sell one and buy several) and grow your portfolio exponentially.  

do you ever see any variations on this, for example higher % mgmt fee and PM covers employees?  

Variations include un-attended, partially attended and fully attended.

They also mentioned that scammers will use different variations of their names.