Creating artwork for 1:1 representation

I need to produce two posters in different sizes for advertising on backlit flex canvas for billboard Posters. I have jpg version of the designs needed. I need to turn this files into artwork of 1:1 scale for the following sizes - Poster size: 3.87x1.82metres finished artwork to be named as icb_1 Poster Size 3.4x1.6metres finished artwork to be named as icb_2 so for each poster size i want the two artwork. The designs need slight rework. The fonts and colours of the text will need to be made bigger and generally have bigger impact on the finished product. This is needed for a quick turn around. psb , ai , esp formats to be produced on a 1:1 scale I need a pricing for this and more importantly duration for the work.