After much consideration, rather than attempting to overlap internet with the new place, I have decided to take the mtadm server offline for a week - just move it to the new house now, and wait for the internet to come online.
In the short term I may set up a bridge from an unlocked wireless in the area, and just serve from there until mine comes online - but we'll see - it may not really be that easy forwarding ports etc when it isn't my router. Most people use the race/teamspeak/linux shell server anyway, and that will be remaining online such that I can use the link still.
The main benefit of the downtime will be in my personal arrangements, with the cost being no mtadm server - but I don't think people are really gonna miss it - things are quiet in terms of it's use lately, anyway.
I'll still be online, but using gsm/wireless in the short term, as I am moving my bed to the new place tonight.
See you from there, folks.
*edit* The MTA Race server statistics/admin scripts will also be potentially offline for this period.. more news to come.