best way to do this is find out who wins a lot in MTTs in your entry level, then do sharkscope
searches on them to find out how much they cash and how many top % finishes they have.
Generally speaking the lower ROI and lower winning players might cash more, but rarely get that big one. The higher ROI type players and most wining cash less but they also win and get the top 3 spots a ton more which is where the big money is at.
Giving figures on it is really not helpful, but if you cash maybe 15% of the time or something you might be doing well. but it really dpends on buyin level, skill level, and if you have been lucky enough to win a tournament recently and also the amount of volume you have played.
sorry i couldn't help you more hopefully someone else has better input.