Asking a question sometimes gets me thinking more sometimes and I come up with the solution myself
I'm leaning toward about every 2 weeks looking where the yellow spots are on bottom of the tank and removing about a small "coffee can sized" cylinder of substrate that goes to the bottom where I also wipe the glass. Maybe I can go over 2 months between full cleans this way.
I think I might need to do at least 2 week spot cleans like this so the ammonia don't build up in his burrows.