the best thing you could do while you wait for funding is to go get the service manual (which we arent supposed to link but can be found easy enough googling).
Review the service manual procedure and look for the special tools/steps you need to get the job done. You can usually search up the names/numbers they give and find a redneck engineered equivalent, or recommendations for standard rentals that will do the job.
I have not done a headgasket on my KJ yet, knock on wood, but I have done them on dozens of other vehicles.
Usually the hardest part for me is getting crank bolt off (holding the crank still can be tricky, and these are usually REALLY tight), and then when re-assembling getting the timing system back together and rotating it several times to be sure you have correct timing is critical.
When you get the heads off, you can check them for plane with a GOOD straightedge and feeler gauges, but I almost always end up taking it to the machine shop anyways to have it planed down for peace of mind. Would really suck if you get all the way through reassembly and then running it only to have that warpage be just a hair too much and you are stuck doing it again.
The block should not need to be decked, but be sure to check it just in case (straightedge and feelers).
Also, be on the lookout for other items that would be convenient to change now while you have it all apart (rad hoses, water pump, thermostat, spark plugs, timing chain and guides etc).