Let's say we don't get promoted in the meantime.
Average ticket price at the Ricoh was £9.50, that was in the Championship (wasn't it?), so let's say £7.50 in L1. Taking the Sixfields fiasco as costing us no fans (let's say they ones that go are balanced out by new fans for new stadium) we'd lose 1500-2000 fans without success over that time anyway. So we're at gates of 8k, paying £7.50. That's £60k/game, say 25 games: £1.5m/season. Add in £500k TV rights, say another £500k each year from either a big game or a player sale on average. I can't find much on shirt sponsorship other than a quote from Bristol saying it's £50k in L2. Let's be generous and say £100k in L1, plus another £100k in corporate and another £250k (10k/game) on advertising, etc. That's £2.95m, call it £3m, maybe £200k a season for the naming rights. I can't see our income breaching £4m/season being generous.
Then you've got £1.3m+ a season in interest to ARVO, any cost for the stadium build/rental, which would have to be close to £1m/season even if we just paid the interest. That's before you even pay a single player. Wages will be £2m/season at least. And we're already making a loss before getting to match day costs, advertising, etc.
I just can't see it adding up.