Other commenters are correct about the state wastewater permitting, but it doesn’t mean it’s impossible if you have the money. Design and permitting will run you around 5k. If you get lucky and have sandy soils/ no high groundwater, an in-ground system is likely $10-20 k. Bad soils (most of vt) will be a mound which is $30k plus. Then you will also have town zoning to deal with. Good luck!