The Condottieri companies fascinate me, but how did they recruit people, was it with propaganda, or did they recruit people as they passed by a city or village?
Also, what was the usual number of men that a company like this could field, was it on the large side or the smaller side?
While not fully answering your question, this answer to I am a Condottieri captain in the Middle Ages... by u/PartyMoses touches very briefly on recruitment. Additionally, it contains a few links to their other answers, namely "who might join mercenary companies"