Battling fleas in a very large rural yard

[Curmudgeoness]

3. I don't think that there are any easy solutions.

Nematodes are expensive from what you say they cost, and that is not a quick solution. That is a slow process for them to kill off fleas, so you would not get quick results anyways. And it is possible that a hard winter would kill off many of the fleas, if you get one. Are you living in an area where you might have a winter kill-off? This was a bad year in my area because our winter was too mild to do significant damage to the population of fleas.

At this time of year, I would try to determine if certain areas of your property are more infested than others, and treat these areas as you have been doing. With all the wild animals in your area, you will never be able to get rid of the fleas, but if there are some places where they are worse, that is where I would concentrate, and maybe where you can use nematodes. Over the years, the nematodes would probably spread. And of course, treat the pets with Revolution or Advantage.