Hi Kai,
How old is your hugel? How tall was it when you first built it?
I am interested in taking the temp, I never thought to do that with a hugel, although I usually record temperatures of
compost piles. I would wager that 130 isn't a bad thing for microorganisms, they move about freely, as do mycelium.
Are you mulching that soil? grass clipping and twigs and regular old weeds are great to keep some moisture in the topsoil. Go thick on the mulch, like a foot or more!
For me personally, I have stopped using bagged manure, as well as manure from any farm that de-worms the animals. The medication persists in the poo and then kills all the earthworms!
Those little guys are my buddies, and they help so enormously by aerating and inoculating the soil. I wouldn't want to try to garden without them.
That being said, if you've already added the manure it will be okay- soil is so complex, and downright magical, it's beyond comprehension. You already have all of the components your garden needs, on site!
I'm going to suggest to you three words that will save you from having to purchase almost anything for your garden: Korean Natural Farming.
I have only recently stumbled upon this and it's completely rocking my world. If you haven't already read about it, the idea is that you capture and grow what good microbes are already present on your site, and tend everything using stuff you already have around, like eggshells, banana peels, grass clippings. you make these things bio available / ferment them and create fertilizers, better than the best you could buy. Serious money saving and you get to feel like a wizard, concocting potions. Sorry if I sound like a weirdo about this, but it's been such a fun adventure. The books are online, as PDF's, a great one is called JADAM
I used to buy so much stuff for my garden, Mykos and all of that. It's great when/if I had a ton of $$$, but I felt like... without it my garden wasn't as fancy. Now I make what my yard needs, like a home-cooked meal, but for dirt. It's been really special.
Good luck, I know your tomatoes will be champs, send pictures!