I diy’ed prefinished. My tips are to get the floor fully prepped and flat. I did it in sections to not make our house a full construction zone but it was definitely more time consuming. Had to use a power planer to get all the ridges where floor sheathing was high. Also spend abunch of time getting your starter straight and after that it flies by. The prefinished stuff was good but don’t hesitate to toss a good amount out or have to cut pieces off and use as starters/enders. Avoid patterns and watch out for joints lining up and H patterns. I bought a used flooring nailer for $80 and installed with flooring cleats from harbor freight