Considering that you can play about 15 games per hour for every table you play it all depends. How many tables can you play at the same time? How many hours can you put into playing? (I think most regs play between 2-3 tables)Edges in these games are small and shortterm varience can be a killer. Assuming you play on pokerstars mobile does this mean you do not use a HUD? It will be hard to see if you are really beating the games or just running good. Or on the other hand beating the games and just running bad.I think without an EV line 10k games should give you a reasonable picture what your true roi is. Altough if I were you I would just move up in stakes once you hit x amount of buyins (depends what kind of bankroll you are comfortable with). But as long as your willing to move up and down in stakes I would say 50-100 buyins should be enough.Also I would not really give yourself a set roi% to get before moving up. Having a 3-5% roi will probaly mean you are one of the better regs in the 7$ games but that will not say you cannot move up in stakes with a 2% roi. As long as your willing to invest time and money into improving and possibly getting coachingm, having an aggresive bankroll management will probaly wield most profit in the longterm.