I was able to get it to work by just using the same planar tree you had in the example file. The spheres never worked even if I tried just one tree.
I did find that post, @chris regarding the UTCI map and no rooms. I was able to get the full sim to work for 4 day period with the custom wind (after much finegling to get the csv file readable - it is quite ficky: see this thread here HB UTCI map with custom windspeed error - SplitAirSpeedFolder failed - #8 by remyweather )
It only took about 10 minutes to run the 120 hr sim 3x3 resolution 2836 point analysis srf on my laptop.
My question remains though, if no rooms, and no e+, and the ground sfc is just assumed to be the air temp, then how much different can you expect the results to be than just doing the LB simulation?
Other question - is there a way to expose an output for the surface temperatures? The MRT outputs are fantastic, but would be great to get sfc temp, unless I am missing it. thx Chris