Hi, honestly it is difficult to read your sketch, however, if you give me an explanation of your concept and goals as well as the additional dimensions I am sure I can present you with a 3D model and engineering drawing to suit your needs. If I understand correctly you are only wishing to spend a total of about 2 hours on this project, which if it is as simple as the drawing lets on, then that is more than reasonable. I quoted 3 hours/week for 1 week in case there are any unforseen problems that may arise with communication. As long as you know exactly what you want and can explain it I don't see that happening. Even though I am new to this site I am not new to design/drafting work, and if you choose me you will not be dissapointed. Thanks.