I'd seriously consider that if you do not have significant power and sensitivity and can handle most anything with ease after 5 years
Quit, and go find a teacher who can teach aiki.
I normally lurk but your statement has me curious. Could you detail your estimate a bit further? Is the expectation of 'competency' in 5 years based off of daily training in internal solo exercises and 3-4 times a week partner practice or some other model?