Let's just say I have an agreement between myself and Jane Doe and after receiving the money, Jane decides to break back into the property and demand more money. 

Then she told me I should probably find a new agent because she thinks that each issue that arises, I will make it tough to work things out.This is one of the problems with residential real estate agents who make their living selling pretty houses to Jane & Dick Public.  

@Jane Istre Welcome to Biggerpockets!

There are many companies at least in my area that offer plain jane windows installed at a great price.I always put the energy effiecient window in because for the extra $70/window it is a great selling feature and is even better for getting higher rent as you can tout lower cost utilities and comfort factor.

This is because you are usually selling it to John and Jane Doe, not another investor.

However, the owners who never raised rents for years because they "liked" Mary Jane tenant, will find themselves way behind the 8 ball and those units will quickly start to go down the slum road because costs for maintenance and improvements do not stop rising just because of RC.

One of your regular customers, Jane Deadbeat, comes into your store and buys a widget from you every month.  

@Jane DangI would bet there are looking to move and don't want to move at Christmas time.  7% is a high increase.  

For Dick & Jane homeowner, who buy 1-3 properties in their lifetime, they can provide more value around negotiation, financing options, etc.Both of the above scenarios signal the need for fewer agents and a devaluation (or realisation depending on your thoughts about realtors) of the service they provide.However, those agents who can take a set of criteria and bring back a handful of viable candidate properties - many of which are not yet on the market - will continue to add value to Investors and will earn their commission (or consultation fees).  

Greg ... it's a hard tale to tell truthfully and Dick and Jane are more likely to believe that Daddy Warbucks the landlord is simply receiving his comeuppance.