Derik Moore, I suggest that you employ a local engineer that is familiar with the requirements, and regulations for septic systems
which are in force in your jurisdiction. There are many factors that will influence the best approach to serving your project with sewage treatment facilities.
I also suggest that you wait until you have enough money to install a high quality system. This is not an area in which you should try to save some money. If you install an inferior system, or one that is difficult to operate and maintain, it will plague you forever, and a failing septic system will pose a public health threat to the future residents of your mobile home park. JWA