1] you should be able to rent the tool , you need to be very careful installing the brgs dead straight so they don`t bind the cam , also you need to make sure the 4th brg cannot block any of the 3 oil passages
2] just use an extension to drive out the out bushing , you can use an old shaft to install the new bushing
3] as long as you use the cam break in lube you can use oil to break in the cam , EOS will not hurt , I use Diesel oil [rotella, mopar ,etc] to break in cams as it has more Zinc
4] hit them on one side so they roll over & pry them out , use a socket just under the size of the plug to install the new plugs use a good sealer when installing them
you can always find me here