When wiil this person be able to replace his engines on a bunch of smaller ones to attach them on clothes?
From the outlet cowling and nozzle, it they look to me like 6 standard RC jet engines (JetCat or so; JETCAT P200RX, for instance, has about 50 lbs of thrust, so in the right order of magnitude).

I don't think there would be any benefit whatsoever to using many miniature engines.