Well honestly, if you can't afford to purchase a bitch and a stud dog at the same time you oughtn't be breeding at this point in time. Most often the male and females you buy together aren't a good breeding combo anyway and you need to look elsewhere for an appropriate bitch or stud, but if you can't afford to buy them both you probably can't afford the litter and aftercare. Bulldogs have to have C-sections. They cannot be born without it and that can run a thousand dollars plus. If you think you will make the money back on the pups think again. You need to have your breeding stock assesed for conformatoin and have health testing done on each dog to make sure they don't have genetic diseases present to pass on. After that you have the the care of the bitch and the cost of the C-section, not to mention after they are born the care and feeding. If your bitch gets sick(mastitis) and can't nurse you have to bottle feed, or she could also die during surgery and then you have to hand raise the babies on bottles every 2 hours day and night to start with. Also there are times when a female who gives birth by C-section won't accept the babies and you are stuck having to bottle feed then too, not ot mention stimulating them to use the bathroom when they are very young. You also have to be prepared to the whole litter possibly dying along with the bitch and then you'd be out thousands of dollars and no babies. Just think long and hard about it and find a well known respected breeder in your area to help you and mentor you and help you find good breeding stock for healthy babies. It's very costly and if you can't even afford to purchase both together you should probably wait until you can. It's not something to takelightly and if you don't do it the right way there is no point in doing it.