You could always hop over to Florida for 3 weeks, get your licences and then come back and get a PFA aircraft which will be much cheaper to operate. You can then get differences training on your new aircraft without it needing to be a Pubic Transport aircraft.
Depending on how much you will fly you can choose the number of members. Aim for 150 hrs per year as the optimum between availability and cost. For 3 of you this will be around 50 hrs each. Our group only manages about 25 hrs each although when we get a new member they always seem to do 35/40 hrs in the first year and then drop back down to around 25hrs/yr.