Greetings!

What little I know about phone companies (I work for a major US Phone and Telegraph company) is that your answers are:

1) No. Although you could trace the poles out and map them. You extra distance is more likely spare loops around the poles, in the central office or POP.

2) No. The might be able to give you a different number, but they will not likely be able to tie it from another central office or POP. If they did, it would also change your local exchange, making local calls no longer local...

3) Unknown, but I would suspect it would take them over one year to figure out how to bill you properly if they tried...

4) I suspect that the noise gets you. As you reach the maximum, the bandwidth out of that DSL line degrades. The further out you are (not necessarily beyond that limit) the lower your achievable bandwidth is. If you are that close to the line, at best you will be able to get the very minimum they can certify. Your usable bandwidth might only be slighly better than a standard 56K modem...

Sorry if I seem a little cynical about phone companies...