Even before you drop a dime on vaping subscribe to PBusardo's youtube channel, he reviews pv like provaris, mechanical mods (stay away), vw devices (gimmicky), juices, and most importantly he reviews the stuff you plant on top of your pv like attys, catos, even rebuildables. You'll discover most of these middle mods you see like egos are relics from the past. Besides, you're going to have your work cut out for you finding your favorite eliquid, not to mention what to use to deliver it. The battery (provari) will be the easiest part of the puzzle. Save your money skip middle mods and get a provari, then continue your journey..
You can't go wrong with a provari, I own a standard and a mini. As far as mechanical mods go I wouldn't say stay away. Maybe for a new vapor it's not a great starter but I use my brothers ggts more than my provari. Mech mods are unregulated but if you use rebuildables they are a must in my book. Especially genesis attys. personally I won't even put a genny on my provaris because of the amp limit. This of course is personal preference but a lot of people end up using mech mods after they went through all the steps. The provari is a great pv but if your trying to get your mom to use an ecig it is probably not the best option. New vapers especially women don't like to carry around a big bulky apv. For her I would suggest a cheap ego twist