The New Zealand government did a study and found that there is basically no harmful effects from any residue left behind after use:  https://www.stuff.co.nz/national/politics/104287037/rental-meth-panic-over 

He noted that wherever the cleaner stepped from the carpet to the tile, he has tracked residual dog hair throughout the home.  

But wish to increase my residual income but am unclear the best route forward. 

I currently only have 3 properties, but am on the prowl to get as many as I can seeing the lifestyle residual income can sustain!

Buying the good deal is easy, but selling it is always hard when it's bringing in monthly residuals and the only place it can go is up up up.

I guess he won't care as much because he can't run for a third term.They say the second term is when the legacy of that President is really known as the first 2 to 3 years of the first term is cleaning up residual from the last Presidency.

I know extensive curry cooking leaves an oil residue in a kitchen, along with the smell of it.

There is no possibility of a residual income stream because all the income comes from doing the deals.

An attorney usually gets paid by the hour where an agent gets paid based on the size of the deal and time involved to close the deal and any ongoing residuals with the lease.You can tell the owner you would be happy to meet his request of not using an agent but would need your attorney to review any agreement before proceeding.

This way you keep your family life intact, make some investments, and pick up some residual income.