Technically most football clubs actually operate illegally, if they were any other type of business they would have closed down a long time ago, most operate insolvent, mostly because of an insane business model relating to players and management, which is driven by fans lust for new players and instant success.
I have business credentials but running a football club is quite unique. My business plan would revolve around asking the fans for patience whilst the club develops a medium term strategy for growth, which would mean not sacking managers and players every 5 minutes, would forge togetherness, hard work and attention to every single detail. Everyones job at the club would be to 1. Attract more first time fans, 2. Get those who come 1 / 2 times per season to come 6 /7 times, those who come 6/7 to be 12/13 and those 12/13 to be season ticket holders and finally season ticket holders to spend more money at the club. It would also be to increase every fans spending with NTFC through merchandise, sponsorship, or corporate, or more games etc
Not sure about being illegal but you are right football finance is typically lunacy when compared with "normal" businesses
100% agree with the sentiment of your next paragraph but with respect it's not a business plan - maybe a strategy based on common sense and the desire for a progressive club but you are unlikely to attract meaningful investment simply on that - and that sadly is why it hasn't happened.