Return on investment entirely depends on the market... you can do research fairly cheap with tools like spyfu, SEM rush to figure out what your market spends pe

Return on investment entirely depends on the market... you can do research fairly cheap with tools like spyfu, SEM rush to figure out what your market spends per month. Be really careful starting out and I would recommend getting your google adwords certification if you have time. Just be aware that in many markets competitors with non-related products will drive the cost up, or competition between market participants will drive the cost up so that there is nothing to gain except for market share (I.E. you pay google to not lose your place in the market)... you should also be aware of keyword situations where it will cost you not to get a good organic ranking as opposed to just having a good Ad position... [hopefully thats enough of a primer] tldr; research before doing anything & it can definitely be worth it if you're in the right position.