Spring fun at the leaky house! Sarcasm as well!

It figures- we've just agreed to sign on for another year at our place (which is depressing in and of itself- Edmonton for another year...), and in spite of already knowing the kind of structural doom (cracked foundation) and other ailments associated with this place, we have had relatively few problems of late- only a broken (again) washing machine, and a blown fuse in the ancient dimmer switch in our dining room. Knock on wood.

When we were initially shown the house, there was notable water damage in the little boot room at the front- the ceiling paper was peeled away and stained, and there was definite damage to the large tiles on the floor, with at least 8 being loose, completely loose, or seemingly sunk into the (somewhat) rotting floor (there are also 2 and a half tiles right where the boot room meets our front room that were broken and missing to begin with). It was presented to us as having been a one time leaky problem.

Clearly, that is not the case.

I'm collecting my melt water in a bucket right now, hoping that come (real) spring one of us won't:

a) fall through what we know now to be a long-time rotting floor
b) have the sopping wet long-time rotting ceiling collapse on us
c) be electrocuted by the boot room light whose housing is a mere 6 inches from where there is water actively dripping.

Delightful.

Anyone with any roofing experience is welcome to offer suggestions or recommendations.