First of all I don't think it's even possible to make a 5 gal batch for 6-7
dollars, unless you grow your own grain and hops. But let's put that aside
and focus on other things.
For a complete newbie the surest way to make a drinkable beer is to go for
no-boil malt extract beer kits. These also require the smallest amount of
equipment. Making beer from grain is cheaper, but it does require much more
equipment, some experience and a lot more time.
If you have a local home brew shop you should pay them a visit and see
what they have available. There are a lot of extract kits available, some
better and some worse. Just keep in mind that if the instructions call for
sugar, you should use malt extract instead (liquid or dried). Although in your
case if you want something that resembles Budweiser, you might as well use
sugar... Because if you make a beer with sugar there's not going to be much
taste or flavor, but Bud hasn't got either.
Also check out another thread at
http://www.brewtank.com/showthread.php?t=2493
where I wrote a little bit more about this same subject. There's also a couple
useful links.