Haha, hand drawing a map is deffinitely the best way to make maps look hand drawn There are plenty of tricks to make it easier, like drawing a few trees by hand, then using them as stamps, or working out things precisely in vectors and then drawing over it to give it a hand drawn fidelity.
Anyway, your maps are very pleasing to look at. The blocky outlining looks really cool and the water colour texture brings it all together real well. The structure of the buildings look like they could have been designed by a mad man or just grown over time. It gives it a weird organic feel even though it's blocky. Did you have plans for the function of the building?