It would probably be easier to pay someone in all honesty.
But once the paint is all corrected they could maintain it hat fairly easily.
For a basic wash & wax if you had no equipment you would need like
washmitt - £10
drying towel £10
plastic protection / tyres (combined to save money) - £10
wax £15+
microfibres - £5
shampoo - £10
thats without stuff like glaze / sealant or even a claybar & assuming you have stuff like a pressure washer, buckets and all that crap already.
www.cleanyourcar.co.uk
only really lists decent products and having a large choice is part of the fun of it, have a look on here at past threads because the choice is endless and everyone has different opinions on products