The Adobe looks pretty good to me. Ok, so the roof has warped and needs work, but its still pretty good, add a door and I amsure it will come to like once you put some pots or a table on the roof etc or maybe a rug.
For painting my adobe stuff I start with a base coat over the whole model inc the base. This is usually in a dark sand colour. Then wash burnt umber around the bottom of the building and the base area where the building meets the earth. This simulates, dirt, dampness etc which can seen running around the outside. Then I wet brush on Bleached bone or similar, heavier towards the roof and less near the bottom. Finally white wet brush around the roof.
The effect I am looking for is graduated colour from dark at ground level up to white at roof height. Then I paint all exposed timbers in burnt umber wash and then drybrush them with bleached bone/off white to simulate sun dried/faded wood.
If you want to see examples look at any of the adobe stuff I have posted on the Old West board.
I use foamcore for my builds, no warping etc, the cork may not be the best material.
My whole adobe town is featured here:
http://boothillminiatures.co.uk/page10.htmFor my old west terrain boards I used houshold emulsion in a dark sand colour (same as I use to basecoat the buildings) Then wash burnt umber around stone and gravel areas, then drybrush up with lighter tones and finally off white. I don't thin the emulsion, I don't think you need to and besides I like to use it thick as it helps to bond the sand and stones to the base and hopefully gives it a bit extra protection.
http://leadadventureforum.com/index.php?topic=18775.0Good luck looking forward to seeing the results.