Big board signs to make and sell. This could be a no cost way to make money. Go to your local salvage recycle center or dump and look for straight long and wide planks to make signs. Buy some good quality acrylic paints for the creating the sign.
Make and sell vintage looking Country Signs
Shown here is a weekend high traffic flea market in Massachusetts
No crying and Dry Goods are new signs that look old and are for sale at this particular flea market stand.
Selling small signs of days gone by.
Draw Caricatures for some extra cash
Go where the foot traffic is, at the Flea market. Set up a standand charge $10 or more per 5 minutes of sketching