A screw gun, hammer, and level will be the most used tools. Time of assembly depends on the size, model and experience of the assemblers. We can honestly say that we have never had a kit returned because the owners could not assemble it. As an alternative, you can always hire a handyman for a few hundred dollars if you don't have the time or inclination to do it yourself. Like most things in life - you get what you pay for.
Some suppliers also send the kit as individual pieces.
The assembly time for this type of kit is in days, not hours like our panelized kits. Finally we offer you expert product support - we are carpenters and builders and have been involved in construction of outdoor structures for over 30 years. Unfortunately some of our competitors only have experience in buying and selling gazebos, not in building them. We revise the site frequently.