Alternative to Bug B Gone?

Can anyone recommend a cheaper alternative to BBG? Something I can buy in bulk yet is equally or more effective? Thanks in advance.

Scotts brand pesticides should never be used on weed even if they claim to be organic or natural.

I would buy some cheap neem oil, they all work about the same. Don't waste your money getting AzaMax it works the same. If you want name brand go DYNA-GRO.

Hot Shot Pest Strips easy cheesy just don't breath them any longer that you have to

Neem oil concentrate at Lowes for about $10 will make gallons of sprayable solution.

I am very concerned about using bug-b-gone.
Is it dangerous to use this on something you plan to smoke down the road?
Just seems risky to me.
Any advice all?