We are building a main house 3 years after building the garage/apartment. The cost of the siding has tripled. We are thinking of doing a mixed exterior on the main house but it would be introducing a material that isn't found on the garage and we're afraid it will look stupid. Garage is stained hardieboard and we are thinking of mixing with metal. The main house will be a 1 and 1/2 story...so would it look strange to do the 1/2 story in metal?