odds to go down 14-1,new season tickets is this a no-brainer?

I notice you can get odds for us to go down of 14-1 .If I get my season ticket early I save £100 .If I invest half of the money I save at 14-1 , I would get £750 back which leaves me with a Championship season for 23 home games and up £250 and it softens the blow if we are relegated .Of course I hope I would lose the bet then I would have paid £550 for a premier league season ticket and still saved £50.



I am not a gambler I have never placed a bet in my life in a bookmakers .I am missing something here.