When considering starting any new business, first scope out the available market. Keep in mind that your startup captial is only the beginning. You will need to have credit available to pay bills until you are able to make money. Businesses can't operate in the red for long before they go under. I run a business and can tell you, you most likely won't see any good returns for the first couple of years for starters. And that is only if you are able to bring in the business and keep your costs down, while remaining competitive to larger chains and online stores.
Take into consideration the population of your area and the amount of lfs's already servicing the area. You will need to research advertising opportunities to get the best value for your money. You will have to contact suppliers to find out what kind of payment arrangements you will be able to make for supplies and livestock. IMO if the market is there, it would be best to go into business with another person you can trust that would be able to provide some financial backing, taking the pressure off you to gain capital. Research the amount of upstart costs, renting a space, purchasing tanks, filtration and equipment before approaching a bank for loans. If you decide to go for it, good luck. But definately do a ton of research first.