I’m 36 and have a few businesses now, the most lucrative being a property management company. We hit over 500k this past year in total profits through the businesses but I won’t consider myself “successful” until I have the kids retired and I probably won’t stop even then. Lol good luck my friend.
If you have good credit you can open up 0% introductory credit cards to get capital. 5% is a good rate, 0% is better. If they want 5% interest forever I would say no deal, and if they want 5% of your business I would tell them to fly a kite off a high cliff.