To manage expectations properly, you'd obviously want to check the legal situation for downstream training etc but the educational value of the build exercise remains very strong, regardless. While an RV6, for example, is "experimental" in Australia and probably comes with some mainstream flying training restrictions on that basis, there are some attractive RA-Aus options available these days if the aircraft is chosen appropriately. While being a big personal fan of RVs, I think some of the options mentioned in the UK posts are a better choice for ab initio training.