Hi, it is very kind of you to rescue so many piggies. I agree with the above, however, that they will need a much bigger space than 10' x 8'
I think
@Piggies&buns has slightly miscalculated but allowing 10' square for the first 2 pigs and 2' for each additional pig still comes to 116 square' for 55 pigs. That said, this space allowance is designed for smaller groups, so, for example 4 pigs would still have 3.5' each but with each additional pig the space per pig becomes less. For large number I think it is better to allow a minimum of 3' square for each piggy because over crowding could cause stress and health issues.