Both your concerns are important. Yes, D., there is a toilet in the bathroom picture, it uses little water to flush, and goes directly into a holding tank. It isn't a big deal.
Places to empty your holding tanks are called dump stations. Any good campground has one. Places like truck stops also have them. If you want to dump at a campground where you aren't camping, there is a fee, $5 is typical. Dump stations have potable water. This is why tank size is so important, that is nearly always the limiting factor on how long one can stay out.
For internet, there are several options. You can hope for Wi-Fi, more and more parks have it, and if all you want to do is check e-mail, etc every few days, you can find hotspots. Aircards hit cell towers, and can be very fast or dial-up speed, depending on the tower and how many folks are using it. Or you can get a larger sat dish, and do internet with it, making yourself your own hotspot. They even have automatic internet sat dishes that go on top of RVs ($3k+). It is cheaper to get a dish on a tripod.
I am a lifetime member of
Escapees. They exist to provide services to fulltimers, like a mail forwarding service and support for changing your legal residence to Texas, where there is no state income tax. Also, cheap camping at a few places scattered mostly down south, and a place you can recover from illness, etc. like a combination nursing home and hospice for RVers. We have a
discussion forum that is very helpful.
Either a motorhome like me, or a heavy duty pickup with a trailer or 5th wheel trailer is the usual set-up. You can research forever different makes and models, but few will withstand the rigors of fulltiming. There are also folks who haul really big fifth wheels with semi tractors, but I think they are nuts. And there are people who do their own bus conversion, but I think they are nuts.
RV.net's discussion forum is very helpful to newbies, with FAQs for many topics. Don't let them fool you, most of this is easy. I agonized about the first time I would need to dump my tanks, because of all the horror stories on the internet. When the time came, I hooked up the big hose, put the end in the hole, pulled the handle, and down it went. Then I did the grey tank. Then I put the hose away. Easy.
You
cannot go backwards with a motorhome when a car is attached behind it (towed=toad or dingy). I cannot back at all with the Subaru attached, it will permanently fuck up something really bad and expensive. I looked long and hard at Airstreams, they are sooooo coool. But I don't want to have to drive a diesel truck everywhere, I want a smaller vehicle.
Well, I encourage anyone with an interest to explore this. However, husband and wife often find out that they love each other, but don't like each other enough to live in such a small space 24/7. And if one member isn't fully committed to the lifestyle, it probably won't work. This is by far the largest reason fulltimers go back to the "sticks and bricks".
I'll answer question about RV's forever here.
-Chuck, Vegetarian fanboy