I can only speak to my own experience but I’ve found the best business advice from older successful entrepreneurs who are happy to share advice for free and help out other small business owners. I paid a “business coach” for some advice when starting out and felt completely taken advantage of…no actual real world experience and lots of cliche forward thinking BS…my best relationships from older experienced people came from being involved in my local chamber, customers who liked what I was doing, church, and golf.