Do some 3D Modelling

Requirements: Looking for a pack of four different 3D asteroids to be modelled and textured. No animation or lighting setup required at this point. Please see the attached images to get an idea of what I'm looking for. Ideally, two of the asteroids will be similar to images 1, 2, 4 and 6... rocky and with craters/indentations etc. Like very small moons in a way. The other two asteroids will be similar to images 3 and 5... more detailed with more surface variety, holes and pockmarks, chunks missing etc. Like more of a piece of coral than a stone. Images 7 and 8 give an idea of what I'm NOT looking for. They're too basic, just look like rocks and the texturing is terrible! Technical requirements: Models should be high poly with high resolution textures. Final deliverable will be an OBJ file, a C4D file and PNG files for the textures. Please don't submit a proposal if you can't deliver the files in OBJ and C4D. You can create the models in whatever software you like, as long as you can send over C4D and OBJ versions (r13, r14 or r15). No triangulation of the geometry. 'Save polygons for melange' option turned on. The model must have a UVW tag. Timescale and budget: Within a few days to a week of award would be good when it comes to delivery, but I'm in no massive rush. If you'll need longer then just let me know. I have no specific budget for this, as it's a personal project (I make space-related stock footage, and I'm looking to build up a library of assets I can use in my animations, without having to license someone else's models all the time) so let me know a fair price for the work involved. The cheaper the better, but quality always takes preference over price. Revisions: If you follow the brief with regards to the example images, I can't see any revisions being required. Might be best to include one round of revisions just in case though.... one round for the models, before you move on to texturing, and one round for the textures themselves. Ownership: As they're being used in stock element, I need to have full ownership of the models, so you can't use commercially available stock models or textures. Needs to be 100% custom work. When the project is complete, you're more than welcome to use the models in your own work or portfolio, as long as you don't distribute the models in any way, for free or paid. Hopefully I've covered everything, but just let me know in your proposal if there's anything I've missed that you need to submit an accurate proposal, and I'll update the listing. Thanks! Scott