If i looked in my van and calculated how much all that equipment cost it would be considerable, if i then decided what i could do without and added it up it would still be considerable, i am not saying that you need 20,000 although that would be realistic to make a serious go of it, i had 15,000 and i still got an old Ninja off ebay so many things that are not taken into account are you going to have liabilty insurance, a van, website, leaflets marketing is a massive expense which you must make to have any chance, the only way i could see anyone doing it on a tiny budget as an add on to other work.