I don't have three but four. For me 2-3 and 3-4 were so much easier. I had experience under my belt to enjoy my baby more. I waited until both number 2 and number 3 were at least 3 before having another baby, as the first two are 2.5 years apart and I found that hard. The gap between 2 and 3 is 3 years 8 months, so nursery was established and I had some work in between so I could enjoy maternity leave even more the second time.
As for love, that just grows. Just like having a second doesn't take your love for the first. Every child is different, I hope none of mine feel less loved. I don't try to calculate time, or even be that fair. If they feel they're missing out they always voice their opinions. That's what comes of having a big family.
I will say we were in a three bedroom until recently and it was hard. When DS1 turned 9 it started to show that sharing with 3 year old DS2 wasn't easy. It got worse when 1 year old DS3 moved in with his 7 year old sister!!!
Having two the same sex and close in age makes it so much easier, provided the shared room is big enough. Many people I know put the baby alone and reconfigure rooms further along the line. We now have 4 bedrooms so my oldest now has his own room and the two little boys share the biggest room in the house.
Money becomes more of an issue, we are comfortable but constantly planning. Especially as we have furry mouths to feed too. University plans are already in place and educating the children about the value of things and deferred gratification can actually be a benefit rather than a compromise. My 11 year old worked odd jobs for grandparents, friends and neighbours to buy things he wanted before Christmas/birthday and actually currently has over £100 in savings now. My 8 year old daughter recently bought herself a £30 toy by doing the same. My 11 year olds Christmas list is a new football and a PlayStation game, he doesn't want or need a huge amount of "stuff". He thinks Christmas is about family, which is refresshing for modern life. Believe me he's a pain in the bum in other ways, so it's not all rosy!
The car was a problem for us, we needed a 7 seater and when we actually looked into it we found the occasional boot space seats were impractical for everyday so we have a giant people carrier. Which was a fairly hefty price. We still have a five seater that I can go with just me and the kids, which is cheaper to run.
Car seats are the issue with cars. I got three across the back of a golf. It wasn't easy if a booster is involved and I found leaving the seat belt done up and letting DS1 climb in was easier than permanent scratched hands and broken nails.
I say noise and chaos are beautiful and worth it. The older the other two, the easier. Consider 5 and 3, but others get on fine with smaller age gaps, so that's just my opinion.