people seem to think that buying in short reduces your swings/variance. if properly played, a short stack strategy usually has more swings than a big stack strategy though.
there´s nothing wrong with open raising 66, but i´d recommend doing it for a smaller amount w/out limpers. as played, gotta call the 3bet. as played then, seems to be as good a spot as it gets to shove the flop with all the dead money here and very nice equity multiway.
fwiw, it´s never a good idea to have short BR for any game; also, there is nothing wrong in going broke from time to time, esp at the beginning of your career
if i were you, i would take my money, buy in full every time i play,hope to hit a heater from the start and run it up. if you go broke, meh, just take the money you can affort to lose in the first place, and no harm done.