Happily, the solution I came up with of cutting the towel into circles worked pretty well. I'm not quite happy with the droop on the lowest circle, but I can bear it. I undercoated everything with some Halford's brown gloss spray paint. I think the aforementioned article in Wargames Illustrated #350 notes the irritation of trying to paint a base colour onto towel by hand! With the roofs, I went for a golden-orange range of tones for the straw, usually doing some drybrushing downward, but also sweeping around, too. For the walls I stippled on a span of dirty creams and browns, suggestive of the natural appearance of the materials. I was cognisant of how the bricks in my house are of a wide variety of colours. Having finished the four, I realised I could have saved myself a spot of bother with the roofs by using (vegan) yoghurt pots. D'oh! That said, it means the easy little things should be even easier to replicate.
As an aside, you can see upside down in that last photo I have used a cardboard tube of Glen Somethingorother. It's Aldi's attempt at a single malt, and is everything you would expect a single malt priced £11.49 to be. I wanted to give it the benefit of the doubt. That said, although it is an abomination as a single malt, it's better than something like Jack Daniel's or Bell's when used in a cocktail, and vastly cheaper than those overpriced tipples, so I may yet buy it again provided it's going into something where I can't taste it. Don't buy it for anyone who likes single malts unless they have a bad case of the flu, and can't taste anything. ;) It is not the amber nectar in the glass on the desk in the background. I think that was some Laphroaig.