[chesterfieldking]

The 2/4 HU at FT is entirely beatable, I paid 2.4BB/100 over 17k hands in rake at 2/4 HU which is basicly the same as the 2.33BB/100 I paid at 3/6 6max. In theory with a little bit of game selection you should be able to sustain a higher winrate HU than short handed which makes the rake even less of an issue.

My bankroll was always between 500-1000BB and my biggest downswing over 17k hands was around 120 BB. 500 BB should do just fine as I can't imagine anyone who plays seriously that wouldn't just want to quit and swallow a shotgun after a 3-400BB downswing.