We dont have blocks in the UK, but according to wikipedia there are approx 8 blocks to the mile, making a block about a furlong, so a few blocks is what, 2 or three furlongs ?

If money is tight, as you say it is, is it really worth spending $300+ (because it will be +) to cover that distance a day, or are you envisioning some other cycling activities ?

Oh, and will you have somewhere secure to keep the bike once you get to work, (because folders are, for sure, thief magnets) ?