Hmmmm, I think I'd go with LHFHG and let her grow a bit in her writing and reading skills. I think this would also give her a year to grow into listening to history readings too. Beyond does have copywork of the poetry, spelling, oral narration, probably a sentence written each day for something, and longer history/science/storytime readings. I think I'd do LHFHG with the first grade options though - 1st. Grade Thinking Skills, A Reason for Handwriting A (Or, Italic B), My Father's World Gr. 1 Science, and Singapore Math 1A/1B. You can decide to EITHER purchase the Beyond Guide/Workbooks only 1A/1B for the hands-on math plans,
OR you can use the 1A/1B Textbooks for the teaching part along with the schedule in LHFHG. If you got the Beyond guide, you could also do Spelling List 1 this year, and then Spelling List 2 in Beyond the next year when you do Beyond. One other plus to having the Beyond guide on hand that I found is I could start the Emerging Reader's Set partway through LHFHG, which is what we ended up doing and it worked great. However, just LHFHG with the First Grade options would truly be enough - just thought I'd throw those ideas out there because we enjoyed them.

If you are still thinking you'd like to have her do Beyond, you could do that half-speed for 2 years still and just know she'd need time to grow into it. You will know best because you are mom!
In Christ,
Julie