We would like to install another 30 to 40 toilets in the town of Gastelum outside of Los Mochis, Sinaloa. In 2016 we installed 30 there, Rotoplas toilets as attached, at a cost of about $1000 usd each. Price now has jumped to $2833 per toilet. Are there any other sources of eco-friendly, sustainable toilets that serve that NW area of Mexico? Thanks