Given the current lockdown you have plenty of time to do some sensible research. Looking at the Streak - try and find a reliable pusher installation of a Jabiru engine - this might be one (but that would make it virtually the only one - get evidence!). There is a reason that a number of aircraft turn up for sale and remain available. The aircraft which are advertised and sell quickly do so for a very obvious reason. They represent reasonable value and do not represent potential serious issues.
They are main stream for a reason - there are no better mousetraps. Aircraft designs are hugely varied and full of dead ends. Avoid them!