How about you get a blood test first and see where you're at naturally. You're thinking of running a dose of testosterone that frankly may be less than what you make naturally; or possibly could be prescribed if you are not making enough. At 35, it could go either way, but I honestly think seeing what you already have first would be prudent in this case.
FYI: I inject more than 200mg/wk just to reach normal values. Wouldn't it suck to venture into this blindly, feel instantly better, and not know that you could have had this all along? Besides, you would want to double that dose to see any sort of results that you likely have in mind, just based on your stats. Us bigger fellas tend to require more of everything, hormones certainly not being an exception.
My .02c