Hi Ron,
1-the cost of each version is 25.000 u$d, 53.000 u$d and 78.000 u$d respectively
2-Weight and estimated consumption for ich version:

100hp: 60kg with 20lts/hr at cruice
180hp: 85kg with 38lts/hr at cruice
300hp: 120kg with 75lts/hr at cruice

3- becouse of the economical problems here we cant make a serial production but we manufacture custom so yes, you can buy them now with a delay of 40 days or 2 month
4-We already work with a local experimental propeller manufacturer and develop together a variable pich propeler in electronic and hidraulic sistem for my turbines but you can use what ever propeler in the market
5-we dont develop untill now a constant speed sistem for the propeler, only fix pich and variable pich electronic and hidraulic sistem.
Thank you for your interest and i hope like the answers and forgive my english

Juan