I'm an LVN (LPN) working on my BSN.
Con: you probably won't qualify for any financial aid after you get your LPN, you'll still have the same bills (or maybe even more) afterwards and school is hard period (escp. if you're also having to work - even if it's just part time).
Pro: the classes have been a little easier for me (in the BSN) program than many of my peers because you've already been exposed to the basics, everything has been easier from prereqs like patho to my nursing classes with care plans
because I was already exposed to nursing dx., etc.
However, I'm not sure if it balances out with the commute, job, lack of family time, dirty house, bills, clinicals, yada, yada, yada...lol
Weigh your options carefully and goodluck...