Just bought a 2018 Promaster 136 WB high top this last weekend, with the goal of slowly doing a DIY conversion. We're planning to go all the way and make it really nice, but will be taking our time and doing it bit by bit. Even though I won't have much time to work on it for the next 1.5 years (long story, but there is a clear change coming) we decided to go ahead and get it now since I travel a lot for work and was spending a lot of money on AirBnB and not really enjoying the experience of having to find a place every other week, having to find the place late at night, having to parallel park in sketchy neighborhoods and walk a few blocks, etc... I've already put 500 miles on my van and stayed in it a few nights and found it quite cozy, even without any conversion work yet.
Here's my 2 hours conversion that's working for me now, until Christmas break when I have time to start working on the vent and flooring: https://imgur.com/a/Kh6Fq1l
I hope to learn a lot from all of you here!