Haha, been there had that, I was without ADSL for 6 months because of a lack of ports. What you could also look at is a wimax connection, latency the same as ADSL, 512k Speed at a cost less than what you would pay for the adsl line and line rental. They usually only offer Wimax where they are unable to provide a fixed line connection - Your case would probably be considered as unable to provide.
I tried to get wimax myself, but my signal was just too low for them to consider installing. They come out, climb on your roof, find a signal and then tell you its too low - what a let down! I was a good distance from the tower, so a good signal was already a slim possibility. You may be luckier wherever you are.
Have a look at Wimax here -
http://www.telkom.co.za/products_services/wimax/cost.html
Any questions - PM me