Hi FollowingMyNose!
I am glad I found your post, because I wanted to know any regrets everyone had too.
I just purchased my first chicks a few days ago. First I lurked on this site reading every thing I could find to prepare myself - cons/pros and starting out stuff like brooders,coops ,pullets vs. roos. Then I got more excited every day just thinking out getting them. I figured on 4-5 pullets for egg laying later on and backyard pets, I have plenty of land. Every day I'd look on craigslist and see what was for sale. Finally I found an ad for 9 day olds and knew that was my cue , these were the ones for me (not having to deal with hatchery and shipping day olds). Well at $1.75 I couldn't refuse - I bought 11.
WOW!!! I have no intention of having 11 chickens. But because they are straight run I figured some would be roos. Well it hasn't even been a full week with them yet and I'd say my only regret is I bought so many. Now in a few months I might not regret this , but right now 11 is to many. They are all the same breed and I can't tell them apart. Plus 11 is just so overwhelming for a newbie like me. I have no other pets (had tons of pets as a kid growing up).
I do love them already , but I think I should have started with 5 to keep it more manageable. Note I also keep them in a 55 gal reptile tank in my livingroom because I adore looking at them constantly, even if I get up at 3am to 'pee' I have to go out and check on the cutie pies.
With that said - alot of people on BYC get 25 -100 baby chicks and manage just fine. Yikes that might be me next year - LOL.
In your case being in the suburbs - try to refrain from the urge to buy more then 4-5. I think you will be soo happy with a manageable flock. As for predators and 'smells' - just keep reading about all the great advice every one has on how to prevent that stuff . Use some of the smallest hardware cloth as chicken wire to protect against predators and clean the coop often (use a poop board under the roost for easy cleaning). I just read in your post about the DE and stall dry - I think I'll use that when the time comes to move into the coop.
That's my advice - from a very new newbie.