Im thinking of getting a squier tele but the only thing that puts me off is the top load string loading can this be converted to a string through load?
Yup. You can buy the string furrules you need from allparts and then you just drill some holes through the body and bridge. I did it to a couple tele kits that come standard with a top loading bridge. To be honest I liked them better when they were top loading. I couldn't hear a difference and it was easier to change the strings with the top loader.