since you are going to use a keyboard and a mouse, i imagine you would be using it on a desk. get wired. always better. and cheaper.
for keyboard, get the cheapest mechanical you can find. mouse are hard to recommend.
no point getting an expensive logitech mouse. one year warranty and they tend to develop double click problem within first year of ownership. if you are going to use it for 12 hours, i doubt it would last for even six months.
if you are just looking for a cheap wireless wireless mouse combo. get any dell or logitech under 2K. these devices have become extremely efficient. i think the model i got for my relative few weeks ago had a rated battery life of 18 months for keyboard and six months for the mouse. and they use...