Even in the Essex Senior League if 'we' started well we'd probably get crowds of around 2500 home and away (because lets face it an away game in the ESL is never going to be far..), with the capacity to attract a lot more. So it would have to be a ground that could probably hold around 5k. Maybe Billericay Town? Not a bad little ground nowadays, think it can seat around 2000 as well.
Realistically it would depend on who owns the ground, the goodwill towards the football club (let's face it, Ron's stiffed most people in south Essex over the years with his dealings) and financial arrangements. Does Billericay Town own New Lodge? Also they're an ambitious club, they will be eyeing up our spot as the number one club in south Essex. Not sure why it would be in their interests to help us. Same goes for Concord.
I'd say Wakering more likely as there is more of a relationship there or so it seems. But not sure who owns Burrough's Park.
The interesting thing would be to see how the council reacts to its football club going pop, given that it is a major player in the planning applications at Fossetts/Roots Hall. Would it insist on part of that land at Fossetts being kept clear for a smaller stadium even if there wasn't means for a new club to build one?