Having a UTH without a rheostat/thermostat is dangerous, especially without a thermometer to measure the temps.
Soil is not recommended as a substrate. Aspen, Repti-bark, paper towels, and newspaper are all good.
You'll want two hides - one for the hot/cool sides. The climbing branches are not really necessary as bp's are terrestrial snakes for the most part.
And make sure you get digital hydros/therms, not analog.
Check this out, it has a lot of helpful info: caresheet
It's still nice to provide them with the option if convenient.