Just some tips-
Never go stingy mode on Foundation, Lantern / Roof ( Get RCC roof ) and water.
I would recommend you to get a basement made if the plot is deep. You will spend more money on constructing it, rather than filling mud.
Basement is worth it. Keeps you cool without AC in the summer and warm in the winter.
Always do ' Mashwarah ' with more than one person. So, if contractor says something, always discuss that with a few others as well.
And, good luck! It's a painstaking process, but worth it. Apna ghar apna hi hota hay. No matter tent or luxury villa.
Make sure to update the process here with pictures, it's quite interesting!