Very little of it. All their assigned equipment belongs not to the state, but the US Army or US Air Force. The salaries for the "pure reservists", come totatly from the Federales, I'm not sure about the funding for the so called "technitions", the full time cadre who, even though they wear USAF or US Army uniforms, are technically civiilians. In many states, OK for example, the "technitions" even belong to a government employees union, all but the officers. Perhaps even some of those, my squadron only had one full time officer, he was a mustang Captain, but was the XO or vice CO (It's been 26 years) the CO being a pure reservist.
Again it depends on the state and the unit and most of the facilitys and equipment like trucks and cars and tools, office machines ARE paid for by the individual states. The feds pick up costs for big stuff like the assigned aircraft and you don't EVEN want to try figuring out who pays what salarys to who when
You should see some of the guard units buildings up here, mighty fine stuff