1st, try to load preloader again. Hold the reset button, keep holding the reset button, push the power button while holding the reset button, keep holding the reset button. The freeze at reboot in 5s suggests it installed, unless it gave some other error prior. Hope it loads for you, because I don't have good news for you if it does not. If for whatever reason, preloader/priiloader fails to install propperly (rare, but happens), without boot2 bootmii the wii is fully bricked.
So assuming it does not load, sorry for your situation. You have two options to fix it. Option 1, replace the wii mainboard, be sure it is the wii mainboard and not the wii dvd motherboard. Very common the buy the wrong one, and the dvd board is cheaper. Last I look a wii mainboard cost about $90.
Your second option would be to have someone reprogram the nand, if you have a bootmii backup. This can only be done on newer wiis if you have a bootmii backup from that wii. Think bad-ad84, erikie, deadlyfoez, these people know how to programme a nand. So depending on where you live, both bad-ad84 and erikie are located in europe, deadlyfoez may be in the states, not sure. You could also do it yourself, if your up to the task.
Your third option would be to buy a new wii and sell the bricked wii with bootmi backup to someone interested in one, or sell it all for parts piece by piece.
Again, I hope preloader loads for you. I don't really think that savemiifrii will work for you, but having a cheap gc-controller is never a bad idea so you may as well give it a try.