evbb//100 conversion to ROI long term

Can anyone more experienced give me opinion in what evbb/100 can convert into long term true ROI?
Assumption1: Player plays 1-10$ buy in so the field is somewhat balanced in terms of skill
Assumption2: Player late reg with 30bb average and that average stays throughout whole tournament.

My thought are that simple we need 3bb/100 for break even (cause 10%ish is rake) and all above that is roi>0 and 10% for every 3bb/100 we get.

Also at the end what are your thoughts what can be achieved in terms of long term ROI with ABI 5$ playing 50%stars and 50% 888 and party?