They wouldn't 'lose it' if he got it flying though, they'd get exactly what they want. They'd own 20% of it, with an easy route to owning more at a good price, with a better understanding of the business, it's strengths, weaknesses etc. They would themselves gain (via their proxy on the board) a better feel for steps they may one day take, and challenges that arise when running a football club, without having any risk. It is a completely normal way of investing.
Very few people dive straight in with a majority stake in a business they know very little about running on a day-to-day level, in an industry they have little knowledge of. Sport is probably one of the few exceptions, but these people don't seem like they leave their business principles at the door, do they?
At what point do you think it's better to listen to rumours than it is him literally saying that they never intended to buy us outright and didn't make a bid, which would be extraordinary claims to make if he knows they aren't true? There have been 50 rumours since the saga began, some of them have been proven completely wrong, some have been closer, but it's a pretty sure bet that most of them didn't start with Donald or Methven. Most start with someone lower down the chain or completely unrelated.
As for the 18-24 months thing, I'm not sure what you're getting at. At the end of that time (or before) they can convert the debt that Madrox has to them into equity in SAFC, a minority stake of say 20% (depends on valuation). At that stage, the intention would be to provide another round of funding at the next level that might achieve the target of getting into the premier league, for example, for an increased equity stake. So in 4 years time they could own 40% of us, and we could be headed upwards. They may then look at their options of assuming majority control.
None of it is a waste of time and the deal could work for everyone if it carried on, but it would be many years, if ever, before FPP were majority owners. This is exactly how people invest in businesses. The fact that most football club owners tend to be megalomaniac egotists who are doing it as a vanity project doesn't mean that's what we would have had.