With the MVP2, if you want to do a dual coil you'd likely have to use really thin wire (32 ga) which is a lot harder to work with than 28ga.
What to buy?
For building I'd suggest a 30w box mod. The hana mod clone is $60 these days. I bought one over 6 months ago and still use it, it's been great for me.
Beside you read up on battery safety if you go to a mod with a replaceable battery, and buy good quality batteries from a reputable source, and a good quality charger. RTDvapes and Illumination supply are very popular on this forum. The XTAR, NiteCore intelecharger, and EFEST LUK chargers seem to get great reviews on here. Cheap batteries or a cheap charger could cause a fire or bodily harm, best to spend the extra few dollars on quality, could save you a lot of pain later.