You will probably spend $40 at www.tailormadedecals.com for a small EDF Jepe F-16, that's for a complete set of custom decals and the solution, etc. The quality will be just as good or better than the US well known players, and quite a bit better than you can do at home unless you have been doing this for years - and since you are asking, I'll be you haven't been

I recently made an order to Tailormade for a larger jet, 80 inch span, 80 inches long - and all the decals including large Royal Navy Roundels and numbers came out to $90 Euros including shipping, or about $120. That is the "setup fee" for most places and you haven't even started paying for materials, shipping, colors, other fees, what have you...