I’m still quite new to eskates (and skateboards in general) so I’m not the best person to give advice, but here’s what I’ve figured. It seems like building your own is generally more expensive than buying a prebuilt board. However, the prebuilt boards may have less swappable parts, which make it harder to maintain, repair, or upgrade. To be honest, I never really considered a prebuilt board because I wanted to have the learning experience of building my own. For me the build process was relatively plug and play, besides soldering new connectors on my motor wires, drilling holes through my deck, and carving the sides of my deck to allow for the bigger wheels. If you’re thinking about building your own, google is your friend. There are a lot of online blogs and forums that can help you. I suggest you plan everything before your buy anything to make sure all your parts will work together.