The kitchen and two bathroom modules will take up 400+150+150=<<400+150+150=700>>700 sq. ft. of the 2000 sq. ft. of space.
Thus, the remaining modular space is 2000-700=<<2000-700=1300>>1300 sq. ft.
Cost of the kitchens and bathrooms is $20,000+$12,000+$12,000=$<<20000+12000+12000=44000>>44,000.
The cost of the other 1300 sq. ft. of space is 1300*$100=$<<1300*100=130000>>130,000.
In total, the cost of the complete 2000 sq.ft. modular home with one kitchen and two bathrooms is $44,000 + $130,000 = $<<44000+130000=174000>>174,000.
#### 174,000