I value my time at over $800 an hour. A partner would make well over $100,000 a year. I could pay $50,000 to have the first unit designed and go from there but feel it would be more appropriate to offer a partnership if anyone is interested. These are terms to be discussed with an interested party.It would make a lot more sense to invest your time, skills and money into something that is both in demand and relatively easy to manufacture. Boosting a cell phone signal is very complex from a technological standpoint even for an advanced engineer so you are essentially hiring for senior management. You offer to trade your skills in logistics for this person(s) service but who is willing to take that chance if they already make 100,000 a year? I don't see much indication in this thread for a serious business plan which you are also expecting them to come up with at least in part.
I'm an entrepreneur myself so don't take this personally. The trouble with good ideas is they are nearly impossible to implement. If you are determined to pursue this idea, you need to step up what you are willing to offer in the form of a presentation or proposal. From what I've seen, you are looking for what I call the 80-20 "Partnership" arrangement: I do 80% of the (real) work and you keep 80% of the profits. The problem is of course determining the value of what we each bring to the table which I seriously call into question.