Why not burn the traitors and try to hatch the eggs?? Give them blood (his own by cutting his hand or something) and the sacrifice of the lives to the flames
I’m not entirely sure about canon, but in my fanfic, Viserys will need to burn someone he loves to do so. Besides, do you really think, the soldiers will listen to another ‘mad’ Targaryen.
He’s dumb to sell them all. I could see selling one or two, but there’s really no need to sell them all.
The Targaryens likely have money in the Iron Bank as well.