Coolant Issue (and special repair tech) caused a no crank no start issue?

So, here's an interesting boggle. I'm working on the car listed above that had some sort of cooling issue (coolant/water pouring out of heater hose port shortly after car was started) which by nature caused extensive overheating. Given to her father to fix (self-proclaimed top mechanic and engineer {rolls eyes}, he filled the hose inlet port with RTV to stop the coolant from pouring out. Which it did, somewhat. Shortly after the car starts repetitively overheating again with the constant loss of coolant but not due to leak. Again, to father for repair. Solution; hard wiring fans to switch located by steering wheel. Switch was grounded close to steering column and other wire was ran to engine compartment where there were two blade connectors on either side of 30-Amp Fuse then wire connects to two other wires which were running to fan relays in engine compartment fuse block #2? (Pass side of engine comp). While he was doing some sort of test and moving wires, he ended up not only blowing the 30 Amp fuse he installed, the car wont crank at all. Checked for fuel pressure, none, replaced fuel pump after verifying relays were good, nothing. Checked for power at relay terminal, nothing. Now, I also wanted to check the other engine comp fuse block #1 and guess what? No power there either. Having trouble finding diagrams that would lead me in the right direction but I'm going to check the starter, ignition switch, and neutral safety switch next (if they have power to them). If not, what components should I be looking at? I haven't done a test for spark yet, wanted to rule out as much electrical testing I can do first cause it seems it should be something fairly simple to stop at least 3 systems from working correctly (fans no longer work either) how many parts can be messed up that would render all 3 systems useless and stop engine from even clicking when its turned to start? Also, as a secondary question: the cooling issue that initially caused all of this. I'm seeing a lot of mud in the coolant overflow reservoir. I'm told he did a flush of radiator with Prestone flush kit and water was running clean through it, and car would run decently for short time but then coolant levels disappeared rapidly, and overheating began to be repetitive. He was testing this when an electrical issue occurred. Could the car (which I am being told sat in a garage for quite some time (i believe the car sat, but seriously doubt in a garage) have sat outside and somehow gotten the blower motor packed with mud? We live in NM and the weather here is something to behold. Where else could mud have somehow caked up that it would stop the flow of coolant to the point of evaporation causing overheating and show signs of mud in coolant res? All and any help given on these matters is eternally grateful for. Thanks for everything.

Jason Samuelson