After just recently discovering Barnard Propulsion Systems, it was a shame to come across the below tweet from Joe Barnard. But I do understand, projects like this and especially rocketry related can become quite pricey when it comes from your own pocket.
But never the less, Joe has started a Patreon page to aid in the support of his VTOL model rocket endeavours.
For a small monthly donation, you can keep this project going and help Joe get to his goal of a successful propulsive landing of his rockets, while also receiving a reward for your good deeds.
Every dollar counts, so make sure to head over to the Barnard Propulsion Systems Patreon page and help Joe out!