Yes, the T-500 is an ideal engine, and we are taking orders now for late January delivery, BUT, soon there will be others that will fly the AV8R as well. I would imagine that by May or June you will see a 500 sized engine from SimJEt, PST, SWB and possibly even JetCat. As far as cost, I think that you could be flying an AV8R for less than $2850 not including your radio.