I don't think it will do more than 1 kite. Also the presure is not accurate (1-2 psi?) Maybe this one for inflation (and end with normal pump) https://www.indiegogo.com/projects/giga-pump2-the-smallest-air-pump-lantern-3-in-1?utm_source=fb&utm_medium=cpc&fbclid=IwAR30EPw-mtIOZGSUS5n1MaUjQ9PuJ3QAb0E0...
Off course age matters, as for all. You should be able to do anything after bypass grafting, keeping in mind not to push it to the max. You are probably on a thinner called ASA, Ascal, salycyl acid, which should not be a problem. Your left ventricle function loss might hinder your max exercise capac...
I use the mystic windstopper, 80€. Like it a lot. Only the harness hook hole does not work for my sliding rope. The decathlon one looks the same without hole but cheaper.
I fly a 10m Aluula Roam. I love the high end especially compared to my previous one strutter. I think with a 7m I could almost cover the entire windrange. Anyone has this combo?