Hi, I have done many re-texture work for my clients, often working with models they downloaded from free sites that consist of very bad topology.
My over is that I will UV unwrap the model at a constant texel density, in a way that is easy to understand, I will also make the textures to match the photos, provide you with all the textures you need for your render and even re-mesh the full model if I need to.
My software is Blender, Blender is a powerful free 3D modeling tool, known for it's advanced UV editing tools.
Hire me and the job will get done the right way.