Hi William.
A very interesting topic, I'm considering hooking up the house and saying sod it to tradition.
I too have the need for daily medication and also depend on a sleep apnea pump at night so would need to have electricity.
I have seen a few places (one in worcester) where you can hire a mail box for postal handling, so I guess Banking and medical post could be sent to that and then they could forward to a specified address when asked to. I.e. when you stop for 14 nights some where.
I've always regarded our caravan as our oasis as 99.9% of the time you are in a friendly environment both in the van and on the site, and you choose where you go and what to see. I'm regularly pleased to not have a mobile phone signal as then work can't spoil my rest. As for TV well what is there worth watching.
I met a guy on the Isle of Wight who was a touring park warden. He lived with the wife in a large motor home on the island for 9 months doing 40Hrs a week at the site and then they buzzed off to Spain in the motor home for a twelve week holiday of their own. He said if they ran short of cash he'd do a bit of wardening over there. When asked what he did perviously, he told me he was a branch manager for an insurance firm and his wife was an administrator for a firm in Liverpool. They both have not regreted the move and treat the working aspect as more of a hobby than a chore now.
Good luck with the life style swap and keep us posted with progress.
ATB Steve