All I come to is vote harvesting. 

You could also just harvest the gains from all the properties with notes, and sell them year by year.

As mentioned above, loss harvesting. 

My neighbor tells me that everyone harvest elk at the back of my property, in the valley where the stream crosses.

Or let's say the fund never earns enough income to fully harvest the entire remaining 25K that you're rolling forward from year to year. 

Once you talk to your tax person you should have a lot better idea as to what will work best for you.Some general tax write off ideas:Does your business need equipment that you can purchase and depreciate aggressivelyCan you do Stock loss harvesting (Sell a stock you have at the loss take that as a write off to help offset gains 3,000 cap I believe) Repairs/ upgrades to existing real estate you choose to use as a write off all in the current yearRetirement accounts (you may also be able to contribute on behalf of kids) 

In the progress of weeding/ harvesting equity from duplexes which are good- but not great cash flowers.

I  ask questions over the phone ,then have them do a back ground if they look like a winner based on a verbal general info .I will do keep one more ready  but not filling out a whole app with personal info .I guess some people harvest money from apps  double triple the cost ?

If your new mortgage is 3.5% but you find something with a 7% CAP rate, you're harvesting the spread!

I'm in the data compilation portion of my hunt, and the data I am looking for will result in thousands of items being harvested for digesting and manipulation; my needs require "big data" to be involved and I was really looking for sources like listsource that was suggested by Zachary.