Where in Richmond Virginia can I buy it? How much should be used to cultivate into the ground in the fall to give it time to soak into the ground?

Go to a feed store close to you and ask around and/or post on their bulletin board. Or, search for a local Facebook buy/sell page and post on that. If you have a truck, many horse boarding facilities will load you up (but that is some weedy business) for free. Put as much as you can into your soil to let it compost over the winter. Good luck, and welcome to this site.

You should be able to get manure for free. In your area there is free horse manure offered on Craigs'List. Whichever type of manure you use it will need time to compost for a while or it will burn your plants.

There is an NGA page The Scoop on Poop here that suggests how much to use and also discusses how to reduce the risks to your health of using manures in a veggie garden:

http://garden.org/ediblelandsc...

The big box stores sell bagged manure from various animals if you don't need it by the truck load.