Hi
JadeVamp1986 what you're proposing is pretty ambitious; taking an inexpensive bicycle as a base and building something to perform the role of a small car or large motorcycle. There's not a "kit" for this, and even if you do all the design and fabrication yourself, I don't think it'll be inexpensive, either.
If we're just talking about neighborhood-level transport, especially if you're trying to make use of bike lanes / paths then an electric-assist "Velo-Car" like an
ELF or
PEBL would fit the sort of image you seem to have in mind. They're also low-speed vehicles; faster than a bicycle, but only by a little; ~25mph, max.
If you need to have enough speed to keep up with "street" traffic (say, 50mph) then at minimum you'd need something like that 150cc
Sunny 3-wheel scooter that
Murray Missile posted in #9. Something like that would be able to carry you and a small amount of cargo through typical day-to-day activities. Bonus is, it's already road legal.
Weather protection is pretty much the same as a motorcycle, though I have seen them fitted with a 'roof' canopy and side curtains to keep rain out, but not an enclosed "cabin"
Going this route though, would prohibit you from bike lanes / paths, and going the path of a 2- or 3-wheeled motorist comes with a whole set of risks and considerations, if you're going to do it full-time