Hey there, sorry for bringing this up. Do you know if freepick still free of charge? I believe you could find many free vectors there. Some of them are not free of charge, but the prices are ok. There is also another website that I use pretty often for
royalty free clipart,
and the quality of them is excellent (I could use it as background for the landing page). In general, I was surprised to find so many websites that offer free of charge stuff. This is somehow unusual but very real. Explore the internet; I'm sure you will find something suitable!