To add some on topic input. Last year I ported 50 lines from TDS Telecom ($25k/year for hosted PBX with metered use) and it took almost three months to port all of our numbers. In the end we ended up being unable to port some, namely ones that had been previously ported from Vonage to TDS. Now we run FreePBX in house with all Polycom IP450 (found a lot of them going for $35 each) and spend far less than that.
My point here is, even if you get approval to move forward, and for the political reasons outlined above I wouldn't poke the bear, it will likely be an uphill battle with TDS.