Butting & bobbing? I wouldn't bother mate. Get down the scrap yard. Get a 2nd hand one for a tenner. That will honestly be just fine.
would it be ok just using a normal battery charger, or do you use anything recomended better as charging the leisure battery,i may start off using a car battery to begin with before i get a leisure battery. hust to get some hands on experience, i will then be able to compare them with the work i do.