Congratulations. You can achieve huge amounts without the Pro service as long as your communication and delivery is good. Some of my customers started off with a $20 fiverr service and ended up 20k per year. Lots of people with a lot of money to spend looking for decent suppliers. Beats me as to why they think Fiverr is the place to go, but they do and are willing to spend, so you may as well be there.
Tip - use fiverr's internal ads. My ROI is huge and dwarfs anything and everything else. 1,346.99% ROI - Annualized ROI 20,837.93%