organics will definitely be more expensive. there are a couple of things you have to consider when considering switching to organic ingredients:
1) foods that are organic aren't always better in quality or consistency. it is a common misconception that organic foods are better or superior in quality. the focus of MOST (but not all) companies that deal in organic foods is to provide a product free or almost free of chemicals and artificial substances, which means less control over how their product is affected by pests, weather, etc... the upside is that they are better on the environment and your body (by not pumping chemicals into your system).... usually... which brings us to:
2) not all "organic" labeled foods are actually organic. do some research before deciding on a product. unfortunately getting "green" or "organic" or "all-natural" things has become a trend, and companies are very aware of it. people are willing to pay more for something with that label so they take advantage. there are different certification programs, or levels of certification, all of which have different standards on what is technically "organic". an example would be: a farmer has 2 fields of strawberries, both are right beside each other. the regular one is on the south, and the "organic" one on the north. the farmer waits for a strong wind to come from the south, at which point he dusts the south field with all kinds of pesticides. the wind carries the chemicals northward over the "organic" field. the farmer can technically say that he never dusted the north field, and if he is a participant in a certification program which is more lenient, the "small" amount of chemicals which made it to the north field wouldn't be enough to void the "organic" certification. he then sells those strawberries at a higher price because he can... screwing you over.
so all that to say: do some research, decide which products you want to represent your shop, decide if using those products falls in line with the overall views of your shop, and lastly know that it will cost more. i'm a fan of using organic products... which are truly organic, and if you educate your customers on it, they will appreciate it.
the organic syrup thing is easy, i don't think it's that hard to make it yourself (at least with vanilla). just buy a pound of organic vanilla beans, split 4-5, and boil them in organic sugar water for half an hour.
the organic milk thing is something i'm struggling with at the moment cause there are no local dairies around to buy from. i wish i could find a good local organic dairy, but there seem to be zero resources for locating them on the web or anywhere else