I am new to this site and I would really appreciate any thought on this.
I am 32 years old male. I used to be in good shape most of my life. my weight fluctuated between 180 to 220 lbs.
three years ago. I had bad right knee and foot injury, runner knee and PF, planter facii, in my foot. I stopped every thing all together and started gaining weight. I reached 235 ads, and decided again to get back to active life style. I bought my first bike, which was specialized diverge I believe. Guess what, I fell in love with cycling, after a few months I decided to buy my a good racing bike, but injuries hit hard this time in both knees. I had to stop cycling as the pain was bad, burning sensation during night. I was busy finishing my phd and stopped every thing all together. I gained weight, this time is 270 lbs. I started active style again and lost 10 lbs and feeling good. knees bothering me from time to time but looks like I know how to handle them.

I got a job and saved some money. The dream still in back of my mind, I want a good racing bike.
It happens I am visiting the states so I can get the bike I want, which is not easy in the country I am from and cost extras for shipping.
I am seriously considering Madone SLR 7, which is ulteagra di2 system.
the question is:
Am I being a child who wants something and keep begging for it here? should I wait until I look like those athletes, or go ahead and buy it?
if you recommend so, would it be good for average distance riding like 30 miles or so 3 times a week as for fun and exercise?

Also if there is any thought I would really appreciate it.
my height is 6 foot and 258 lbs.