Other than just posting and hoping, what can I do to get the 8 other locals to start getting interested in these sets.
So at 8 people per a tournament you should be looking at anywhere from $40-$50 in prize value distributed to 1st and 2nd for a $10 tournament. You're looking at $30-$40 profit if you had to physically spend $50 in prizes.
Ehhhh...
If you're going into virgin territory, you generally don't want to scalp the entries. Most people don't want to pay for just the "privelege of playing in a tournament", especially since anybody can set one up on their own without having to part with $4-$5 for what they would consider nothing.
I advise having 100% prize support at either $5 or $10 entry (usually $5 since these people don't play the formats as it stands, so it's not as much of a risk) and if the store owner requires something out of it, give store credit away as prizes. Also, distribute prizes to more than just first and second place - at least extend them down to third or fourth. This way, you won't get the inevitable "I'm just showing up to donate my money" sentiment from as many people. Granted, the prize support won't be much, but you'll be much more likely to build a player base.
If you scalp the entries though, I can almost guarantee that at least one person will ask what that 40-50% of their entry fee goes toward, and when you can't come up with a good reason (ie: a massuese to rub their feet while they play/strippers that happen to be DCI judges, etc.), you won't have anybody at your next event. People do not like contributing to your 40-50% profit margin for non-value-added "services".
Where are you doing this, anyway?