Word of mouth is the best way.. be different then other forums...The biggest key here is what you wrote in your thread.." no other forums for this hobby " .. Thats an advantage already.

The internet today is much (way) different then 10 years ago when IA was started.. Social sites were not the " In " thing.. so advertising was a little tougher.. But now, is so easy to push any site for free on big social sites..

The Idea w/ IA back in 2000-2001 was to have a car forum that bullshit was allowed.. It worked.. it blew up... Now, to many of the same out there.

So you must be different.. and thats tougher now a days.