i can appreciate where the Op is coming from and the dilemma he faces with his dad.
I havent read every post and apologies if I've missed anything ....
I'd like to add teh following personal experiance if I may.. The teenage son of friend of my wife's was in a local band and spent hours and hours practicing guitar ( not bass) and took menial supermarket shelf stacking jobs to get by - his dad was not impressed in the slightest - kept on at him to get a proper job and/or go back to school. the band played a few gigs and had original material on myspace and over the space of a couple of years the band gained mpore and more popularity locally (Manchester UK). so much so that they were talent spotted and given a recording contract - they released a debut album and got a gold disc - which his dad now proudly displays on the living room wall and is so proud of the fact his hithero wayward son followed his gut and stuck with his dream of becomming a sucessful band member. Note sucessful band member not musician ... he apparantly cant read music but can play his instrument like the pro he in fact now is - he gets paid to play and now tours the world with the band supporting major artists. he is only about 22 years old or so.
I am not sure if this is an exception or not- it probably is but the point here is you have to make a choice ... go to school and study to please your parents or follow your dream/passion and study to please yourself. Its a tough call if your dad is paying for college but how many kids choose not to follow their parents ideals as far as schooling is concerened - its your future and you have to do what is best for you.
My own stepson was always into computer games from an early age - we thought he would grow out of it and settle down to study for a proper job . he didnt but we didnt pressure him and reluctently funded him through university for three years to study computer game storyboard design - he graduated with a first class honours and a special award for excellance in his studies. he is now still looking for work in his field but is hopeful of something next week actually - the point here being if we pressured him to study something he didnt really want to do its unlikely he would have made it through unniversity. at least he has a good qualification rather than perhaps something mediocre. He is living on his own in London and working bars to pay his rent - he made his bed and he is lying in it - not our choice but he is his own person and wants to make his own way in the world and you have to admire his tenacity and hard work.
So we have two people who are so passionate about what they want to achieve that they went for it regardless of what the parent thought was best for them. One is a sucessful band member and one is still looking for work.
its a tough choice for sure ... if you can study music and have a plan B then that isnt a bad thing - but are you then diluting your true passion??
My wife & I chose to support our son 100% and if it doesnt work out he is still our son and we will continue to support him ( not necesarily financially though - he still needs to support himself as he is doing presently

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Good luck with whatever you decide.