workshop manual should be fine. recommend you get a bunch of snap-close plastic bags and a marker to put bits into and label as they come off the engine. when you take the timing cover off, all the bolts go in a bag for the timing cover only etc that way you wont be standing there scratching your head wondering where the missing bolt is or worse, why you have one left over at the end
to get head studs out that you don't want to reuse (ie you will be geting new ones) you can put two nuts on and lock them against each other (turn one in one direction and the other the opposite so they tighten against each other) and then undo the stud using the locked nuts. i don't recommend this if you want to reuse, as it can damage the stud and nut threads. better to get a stud gripping socket (don't know their proper name).
depending on the mechanic. it should not be a problem as long as they are experienced with minis. If not, like yourself, pulling it apart is the best way to learn how to put it back together. if you go to the trouble of pulling it apart, you can probably assemble it, but you would need to take the bits to someone qualified to remachine, or at worst tell you its a lost cause and it needs to be replaced. you need a torque wrench and feeler guages to reassemble, not really any other special tools.
flywheel pullers can be had from karcraft for about $60. best investment the mate i borrowed it from has made, apart from maybe his trailer
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the world is a book, and those who do not travel read only a page
66 Mini Minor sponsored by
http://www.lifeonthehedge.com.au/ The Dog Harness Specialists
It was a pleasure ausmini. I'll miss all you misfits and reprobates
cheers mate, expect alot of qs lol
my tourque wrench is 3/4 too 
ill listen!
and ill get to learn some stuff along the way, which is a great thing 