
Put my 7-year-old (starting 2nd grade) dd and my 5.75-year-old (starting 1st grade) ds in Beyond as soon as I can get it. ds is starting singapore 1A right now anyway, and has started phonics instruction. dd is in R&S 2nd grade math but I'm considering switching her to singapore too.
Then, when my 4 year old turns 5 (in Dec), start LHFHG with him. We'll go half-speed for a while if we need to. So far all indications are that his attention span and desire to learn are higher than his big brother's, so I do think he will do great with this plan.
As for the 2 year old, I'm going to try to devote some special time to him each day where we read books and play. I am bidding on a LHTH set on ebay that I could use for the 2/4 year olds now, but if I don't win it, I'm going to need to wait on that.
I'm so excited that I found a way to spread it out. If I can sell a few things I'm not using here, then getting the Beyond set is very do-able.

Just wanted to share.
ETA: In case anyone is wondering why my ds isn't even 6 yet and we're about to start 1st grade, it's because he has an August birthday, so according to the school system he's finishing up K. We school year-round, so we aren't waiting till Aug/Sept to start the new stuff. I think he will be fine with this but we can take it slower at first if we need to.