Are you really sure that you want advertising on your website?
You state that your traffic is getting busy so your site appeals to your specific clientele,
Advertising banners, pop ups etc put people off visiting sites, plus can put unwanted tracking cookies and many more nasties on to your visitors computers.
If you want advertising for monetary gains, advertise your product or specialist advice, you will not make a lot of money through random advertising, you will lose more in lost visitors.
This is only my personal view, others may think differently, but I would never have advertising on my business web site.
Happy Parping Shewy