New leech field cost in NY State

Hi All;
I am trying to find out what would be approximal cost of the new leech field for about 15-20 trailers. Also how long does it take to put in? Will I need the permits (I am sure of it, it is NYS after all) and what to watch out for during the process. Also can I expand the leech field if I decided to double the number of the trailers or will I need a new one. I am investigating new park and I would like to have a rough idea what am in for.

As always
Thanks in advance
IC

@icotler60
Sounds like you need to hire a professional engineer to tackle these questions.
I would start out by finding a good septic contractor and ask for a referral to an engineer.

Usually, you will need a permit to install/repair/expand your septic system and another permit to add more units. I am not familiar with NYS but I suspect they will require some type of approval/permit.

AW