How Do You Raise More Than One Kid?

Kaelin was an only child for a long time.  After she was born, our family was complete.  We knew we didn't want or need any more kids. 

But life happens and several years later, Jason and I started talking babies.  If?  When?  How many?

Harper was born when Kaelin was 8 1/2 years old.  She loves her little sister and she's a great big sister.  Honestly, I really can't imagine trying to raise another baby without her help.  But things are different now.  I'm older.  I have so much more patience with Harper than I did with Kaelin.  Kaelin had colic.  She would scream for something around 20 hours a day.  When her dad came home, he turned on the Playstation and asked me why I couldn't shut the baby up.  After all, he'd been at work all day. 

I only breastfed Kaelin for 6 weeks and never exclusively.  We didn't cloth diaper.  I didn't feed her homemade baby food.  I had no problem sticking her in front of the tv when she was being too bothersome.  I stuck her in daycare and went back to school without a second thought. 

Harper's experienced the opposite of everything.  She's exclusively breastfed and cloth diapered.  I bought a food processor and have books about making your own purees.  The only tv she watches is when Kaelin or I watch tv.  I'm still not sure if I'll ever go back to work, but I hate the thought of not being with Harper all day.

Do I love Harper more than I love Kaelin?  Of course not.  Do I feel that Harper's gotten a lot more attention than Kaelin did, even as an only child?  Maybe. 

A four month old takes a lot more work than an almost nine year old.  I have to give Harper a bath while Kaelin can take an unsupervised shower.  I have to nurse Harper while Kaelin can pour her own cereal.  Kaelin's content to read quitely in her room while I have to play with Harps.  I try to do special things with Kaelin like let her run errands with me while Jason takes the baby, but she's not really interested.  She doesn't want to watch movies with me and rarely curls up with me in bed.  It doesn't seem that Kaelin feels the same way I do; she's already in negotiations for another sibling (as long as it's a girl).  Yet she tells my parents that she never gets to spend time with me.  Am I missing something?

Wow, I'm completely rambling now.

Would I feel differently if Kaelin and Harper were closer in age?  Or does it not matter how old they are -- I'll always worry that I'm treating them differently?  Does this get easier with more kids?  Harder?  Am I going to have to pay huge therapy bills?