Drawing Plans for Garage Conversion

[Account Closed]

I am looking to convert the garage of one of my parents rentals into a bedroom with a bathroom and possibly a kitchen in order to rent it out. I was considering drawing the plans myself and submitting them to acquire a permit. I have absolutely no experience. I was just wondering how difficult this process is and if I should just hire someone to draw the plans for me. 

After I receive approval I will be converting the garage myself and contracting some of the work out. 

Any advice or criticism is greatly appreciated thank you.