I had the same questions as I moved closer to my purchase, but I was very encouraged when I got a chance to ask Richard Van Grunsven that question at OSH. Ken Scott said 90% of the work could be done by one person, and Richard said it might be closer to 95%, if you try hard enough. I am also in the position of not having helpers readily available, but I do have friends and EAA 113 chapter members that will help out if necessary. I've finished the empennage metalwork on my RV-8. I've got a total of 274 hours on the clock so far, which may be higher than average... but I'd rather be careful than quick. That 274 hours also includes helper hours... which came to the grand total of 7 hours of assistance... and one of those hours was the first counselor's inspection! When I receive my quickbuild kits, I know I'll need help with initial unpacking and setup, because they're starting out as big pieces. And I'm sure I'll draw on the talent and assistance of other experienced builders as it gets closer to finishing. But I'm sure I'll be able to do a LOT of the remaining work solo. So keep us posted, and if you post a builder's log online, share it. You'll be glad you did!