Holly gave lots of good advice and tips.
I'll just add a couple of thoughts, more specific to the PC and the B+ style.
First, you absolutely cannot beat getting a rig built and sold factory-direct. PC was extraordinarily accommodating in making changes to my rig that made it more suitable for full-timing (for me, that meant trying to get as much storage as possible).
Phoenix USA is also awesome to work with when it comes to after-sales support. You don't have to look far through some of the threads on this forum to find case after case where people are able to resolve issues with PC's help, often with Kermit's direct assistance.
As for B+ vs. C type of rig, most of the C's I have seen use that bunk-over-cab area like attic storage. Personally, I prefer the streamlined, aerodynamic shape of the B+ and I love having the entertainment center up there. It works great for TV viewing from my dinette and from my rear corner bed. If I had little kids traveling with me fairly often, then I could see having that bunk instead. But, honestly, even then I think I'd prefer sticking them outside in a tent and keeping my entertainment center intact.
Holly brought up really good points about the length and weight of your rig. At 25 feet (no slide), mine is great for me and my dog. We do a lot of state parks, some with small spaces, crowded with trees. Except for when I was first learning how to back this thing up, we've never had a problem fitting into a spot.
You don't mention if you have RV camped previously or not. If you have, then you have a great head start on figuring out what will work for you to turn your full-time dream into reality. If you are new to RV'ing, don't despair! Research, research, research. Go to RV shows. Talk to anybody who will listen and hopefully respond. And if you are possibly serious about a PC, take a trip to visit their factory in Elkhart!
Good luck in your planning and let us know if you have more questions along the way!
P.S. Holly, have you considered having your blog put onto Phoenix's blog page? It's very well done and I enjoyed reading about your travels while you were out there.