I moved into a condo 4 months ago and would like to replace the old toilet
which I fear might have a crack at the tank. Besides most of the bolts and
washers are corroded.

I bought a toilet kit (includes toilet seat,tank,wax seal etc) and flange
from home depot.

I meanth to install it myself but friends have cautioned me against doing
so.

roto rooter is charging $400+ for the work of installing the toilet
some others are charging $80+ for 30 min of work.
I know a handy man who could probably help me do it for a lot less (hes
well on in years so Ill be doing most of the lifting)

my questions a

1) how difficult isnt it to replace a toilet
2) are there any horror stories anyone wants to share
3) what should i watch out for?

Please share personal experiences if you have.
Thanks