I don't really have any specific advice, but 100 hours a year is REALLY slow! Are you at a small flight school or part time or something? As a flight instructor I was doing more like 50-70 hours a month, and some people do more than that. Sorry I can't give you any specific leads or anything, but you should really think about taking some steps to increase that rate of time-building. With that said though, the time you have is not bad. With 700 hours you should be able to break the 1000 hour mark within a year if you find a good flight school or something. Good luck!