It is interesting to hear all the complaints about the clumping and power issues only to hear the other side that has no issues.
To me, I have been thinking about this very purchase for a year. The gas issue is a small issue, but one you can get over, I think.
To me, it is the clumping that scares me, although I know it is probably not as bad as some say. As for scraping, I know @ryanknorr
posted footage of the underside of his mower and it has clumps. but if you get to them when it is wet, I am sure it is not awful.
I have a 21" JD and do 13K. I also have a 42" craftsman rider that I am yet to pull out of the shed this year. For me, I think the 30" would shave just enough time that I replace both, although a commercial 48" is in a whole other league.
I cannot imagine Toro with the name selling a mower that cannot cut grass. Like anything on the internet, it is the people with issues that are the loudest and those that love their mower are too busy enjoying what they have to run out and tell us how amazing it is.
If your budget is 1k, then the 30" might be the purchase for you, but at 20K, a 36" commercial might be worth the extra savings too, they are not that much more.